Main Body Systems Sample Essay

The respiratory system is one of the organic structures most of import systems. the chief end of the respiratory system is to supply gas exchange so the inhaling of O and the exhaling of C dioxide. In the wellness and societal attention puting the words “respiratory rate” or “resps” are frequently used. this merely means how many times a individual breathes in a minute this can assist to name jobs such as asthma and other external respiration related unwellnesss. Partss of the Respiratory System and what they do

Nose: the olfactory organ is a chief portion in the respiratory system as it is the chief manner in which gasses enter and go out the organic structure. Your olfactory organ has two anterior nariss which lead to the rhinal pit the air passes through these and leads into the windpipe.

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Mouth: the oral cavity is another manner for air to come in and go out the organic structure this allows us to take a breath in and out how of all time the olfactory organ is the preferable manner of external respiration.

Trachea: the windpipe is a really of import portion as this is where the air flows from the olfactory organ into the lungs. The windpipe is made up of gristle and ligaments this prevents it from undermining in each clip we take a breath.

Bronchuss: the bronchial tube is where the air arrives after the windpipe this splits into two supplying each lung its ain air supply. This so splits off into the Bronchi tonss of small tubings are formed which spread out right across the lungs doing certain the air covers the whole lung.

Lungs: the air so reaches the lungs which is where the blood is oxygenated and pumped back to the bosom ready to be transferred around the organic structure.

Alveoluss: one time the air has reached the lungs the O exchange so happens across the membranes of the air sac. These are little balloon like constructions which are attached to the bronchial transitions.

Diaphragm: this is where take a breathing starts the diaphraghm is a musculus which is located below the lungs. As we breathe in the stop contracts this therefore creates more room for the lungs to take in more air. When we breathe out the stop expands cut downing the sum of infinite the lungs have coercing air out of the lungs this is the chief musculus the respiratory system uses.

The Breathing Procedure
Breathing Begins when you inhale air through your olfactory organ or oral cavity and into your lungs. As you breathe in the stop expands doing more infinite for the lungs to make full up with more air. The air so travels across the lungs and the O is taken out through the air sac and transported around the organic structure through the usage of ruddy blood cells.

The cardiovascular system
The cardiovascular system or the circulatory system is the pumping of oxygenated and deoxygenated blood around the organic structure. The blood: the blood is made up from a mixture of 3 things ruddy blood cells white blood cells and plasma. The blood conveyances things around the organic structure such as endocrines and foods from our nutrient. The ruddy blood cells merely purpose is to transport O around the organic structure. These cells have no karyons so they can non reproduce this is why their lifetime is normally a upper limit of 90 yearss so they are replaced.

The white blood cells purpose is to contend infection. These cells are invariably detecting the blood to guarantee that unwanted bacteriums aren’t present. If they detect unwanted bacteria they can support the organic structure in assorted ways by bring forthing things such as antibodies.

Plasma within the blood takes up half of the bloods volume. 90 % of plasma is chiefly H2O nevertheless the other 10 % consists of proteins. minerals. waste merchandises. coagulating factors. and endocrines.

The bosom
The bosom has two atriums and two ventricles ; the ventricle on the right receives blood from the right atrium and sends it to the lungs to pick up O this is so returned to the bosom by venas. The left ventricle receives blood from the left atrium the blood is so distributed around the organic structure via the aorta. The bosom ne’er rests this is why the musculus must be strong to defy the work load. The normal beat for the bosom to wager is known as fistula beat. the bosom can besides crush in different beat one is ventricular fibrillation when the bosom isn’t in its normal beat and races but no blood is being pumped around the organic structure. This must be treated desperately as it can take to decease the criterion intervention for this is CPR followed by an electric daze from a defibrillator. Ventricular fibrillation

Ventricular fibrillation

Arteries
The arterias are the thickest blood vass this is because they are under huge force per unit area and they have to defy high volumes of blood being transported through them. The force per unit area of the blood in these is high as the bosom has to acquire the blood right around the organic structure this is why when taking a blood force per unit area the systolic ( top figure ) is ever higher as it is the blood go outing the bosom as appose to the diastolic ( bottom figure ) which is the blood returning to the bosom at a lower force per unit area.

Veins
The venas are the blood vass which transport the blood back to the bosom. Most venas carry deoxygenated blood back to the bosom this is why they are non every bit strong as arterias. Veins besides have valves to forestall the backflow of blood.

Capillaries
Capillaries are highly little and are located within the tissues of the organic structure their chief intent is to transport blood from the arterias to the venas. Capillaries are most abundant in tissues and variety meats that are metabolically active. For illustration. musculus tissues and the kidneys have a greater sum of capillary webs than do connective tissues.

The Digestive System
The oral cavity: The digestive system being at the oral cavity where the nutrient is broke down into smaller pieces and assorted with saliva. As the nutrient mixes with the spit the saccharides are get downing to digest. The Oesophagus: one time the nutrient is broken down it travels down the gorge and into the tummy where it is broken down even further.

The Stomach: one time the nutrient as entered the tummy it begins to churn as the nutrient is assorted with the stomachic acid in order to kill any extra bacteriums which could do us harm. The tummy is strongly acidic it sits at 1-2 on the pH graduated table therefore the tummy has beds of tissue which are immune to the acid. Once the nutrient has been broken down it so leaves the tummy at small spots at clip.

The little bowel: the partially digested nutrient so enters here it is so assorted with chemicals from the liver and the pancreas to. The little bowel is about 6 meters long.

The ileum: is the lower subdivision of the little bowel. The to the full digested nutrient is so absorbed here the foods from the nutrient are so taken at this phase of digestion. Proteins and saccharides are passed directly into the capillary web.

The colon: this is where the little bowel meets the big bowel. within here are two biological leftovers the appendix and the cecum. in the human organic structure these have no usage as they are for being who survive chiefly on grass. The colon runs all the manner to the terminal of the digestive system which is finally the anus as the fecal matters is stored in the rectum until we are ready to dispose of it in the right manor.

The liver: the liver produces bile this is what is used to emulsify the fats in the organic structure. Bile besides contains debauched hemoglobin from old and broken ruddy blood cells this is how the fecal matters is a brown coloring material. The gall is sent to the saddle sore vesica where it is stored until it is needed. The liver besides removes sugar from the little bowels and turns it into animal starch for storage.

The pancreas: this is located between the bowels and tummy. it produces an alkalic substance to neutralize the acidic liquid secreted by the tummy. Pancreatic enzymes are responsible for the dislocation of protein fat and carbohydrates these are of import for the complex dislocation of all nutrient molecules into aminic acids. glucose similar sugars fatty acids and glycerin.

The Nervous System
The nervous system is a fast message system intending that it is responsible for observing any alterations. treating information and telling actions all over our organic structure.

The Brain
The encephalon commands the full organic structure. The encephalon is the organic structures chief information Centre. the encephalon is made up of one million millions of nerve cells. The encephalon helps the organic structure respond to the information it receives from the senses. The encephalon besides processes ideas. when people think it means that the nerve cells in the encephalon are working. The encephalon has three chief parts. The largest portion of the encephalon is the cerebrum ; this controls vision. touch. odor. gustatory sensation and many other senses. It besides handles motions you have control over such as walking. When people think this takes topographic point within the cerebrum. The cerebellum is another subdivision of the encephalon called root. The encephalon root links to the spinal cord and it besides controls digestion. external respiration and the whipping of the bosom.

Spinal Cord
The spinal cord is made up of nerve cells that runs up the spinal column and attaches to the encephalon root. Information from the nervousnesss branch out to the remainder of the organic structure goes to the spinal cord. Many messages are processed by the spinal cord but most information is so passed onto the encephalon.

Message Transmission
Nerve cells are all equipped with extensions. These are called Axons and Dendrites. When the message is sent it travels along the extensions as a moving ridge of electrical alteration. When the nervus cells run into there is something called a Synapse which is merely a spread from the nervus cells meeting. For the message to be set across the spread it uses a chemical called a Neurotransmitter. Most axons are covered by a fatty sheath of Myelin. This acts as an dielectric significance that the message is able to go faster along the nervousnesss.

Voluntary ( bodily ) Nervous System
This involves any actions we do when we are under witting control. I. e. Speaking. motion.

Involuntary ( autonomic ) Nervous System
This is any actions which are non under witting control. I. e. Breathing. our bosom rate. perspiration.

Parasympathetic ( remainder and digest/unstressed )
This means that:
* Our students constrict.
* We produce more spits.
* Slower. shallower breaths.
* Our bosom beats slower.
* Pancreas. tummy. bowels and bladder go more active.
* We besides become easy to elicit.






Sympathetic ( ready for action/stressed )
This means that:
* Our students dilate.
* Our oral cavity becomes dry.
* Deeper. faster breaths
* Our bosom beats faster.
* Our liver releases glucose.
* Pancreas. tummy. bowels and vesicas becomes less active. * We become hard to elicit.






The Musculoskeletal System
The map of this system is to supply support. assist us with motion. and to move as protection for our variety meats. The Two Main Structural Sections.
The Skeleton:
The skeleton is made up of 206 castanetss when we are to the full developed as a kid we have 450 castanetss as our organic structures are non to the full developed. As we develop our castanetss meet and organize a sutura hence cut downing our figure of castanetss to 206.


The Bone Layout:
The castanetss are layout in a complex manner to guarantee that they do the occupation they are meant to make. The construction is as follows ; The toe bone connects to the pes bone this is where the organic structures weight is absorbed. the pes bone connects to the mortise joint bone. the mortise joint bone connects to the leg bone. the leg bone connects to the articulatio genus bone. the articulatio genus bone connects to the thigh bone this is the largest bone in the organic structure this bone besides produces the most ruddy blood cells from the bone marrow. the thigh bone connects to the hip bone this bone varies in size dependant on the sex of the individual as a female hip bone is bigger in size than a males. The hip castanetss besides protects the females sexual variety meats such as the ovaries. the hip bone connects to the back bone where there are 22 pieces of craniate. This bone protects our spinal cord one of the most of import parts of our organic structure. the back bone connects to the shoulder bone. the shoulder bone so connects to the cervix bone and eventually the cervix bone connects to the caput bone besides known as the skull. this bone protects the encephalon along with the intellectual spinal fluid which besides covers the spinal cord. Joints

The topographic point where two castanetss meet is called a joint. most of these joint don’t move apart from 3 articulations in peculiar these are ; A pivot articulation this is at the top of the cervix this allows us to travel our caputs from side to side. A flexible joint articulation these are located in the articulatio genuss and elbows this allow us to travel our limbs backwards and forwards. A ball and socket articulation these are located in the hip and the shoulders these allow us to travel our limbs in a 360 degree gesture A saddle articulation which is located at the terminal of our brass knuckss this allows us to travel our fingers A gliding articulation which connects the carpus to the beginning of the manus leting us to pivot and flex our manus And the conyloid articulation this is the joint which connects our fingers together leting us to flex our fingers.

The Muscles
Muscles are made up of striated musculus tissues. They attach two castanetss across articulations whenever they contract ; muscles draw on the castanetss to do them travel at the joint. When traveling the joint in the opposite way another musculus must contract to draw it in that way. By making this the musculuss become an antagonising brace.

There is besides 3others points included in the Musculoskeletal
System. They are:
* Cartilage: this forms a liner at the terminal of castanetss to halt them from rubbing each other off. * Ligaments: Tough. hempen tissues that hold castanetss in place. * Tendons: Tough. hempen tissues that attach castanetss to musculuss.

The Skin
The tegument is the largest organ. Its map is to protect our internal variety meats and castanetss. Your tegument is a support system and keeps things in topographic point. It is besides a barrier for bacteriums and diseases as it stops them come ining the organic structure. Your tegument makes certainly your internal variety meats don’t become dry or dehydrated. The tegument has many maps and another is that it produces sebum ; this stops your hair and tegument traveling dry by doing it oily. Sebum besides makes your skin H2O cogent evidence. The tegument makes certain your organic structure temperature maintains a normal temperature. It helps give worlds a form and besides excretes perspiration and some weight.

There are two beds. the top and bottom bed of the tegument. The top is called the Epidermis. inside this bed of tegument there is many other parts. The base bed is in the cuticle. The base bed divides cells and pushes beds above it. The spine cell. locks cells into place. The granule cell bed is where the cells begin to acquire tough and die ; you lose 30. 000 cells a twenty-four hours! The keratinized squames these cells are dead and rainproof. Langerhan cell. this alerts your immune system to infection. Melanocyte produces Melanin which in natural sunburn and eventually. merkel cell this is a touch detector which is sensitive to light touches.

Then there is the lower bed of the tegument which is called the Dermis. This besides has many parts. The hair shaft. keeps animate beings warm and traps air in animate beings. The hair erector musculus this makes the hair on your organic structure stand up. The perspiration secretory organ. this makes perspiration which cools the tegument when it evaporates. The greasy secretory organ. this produces sebum to waterproof the tegument. Blood vass. these supply foods and take waste. Paninian atom. this is a touch detector it is less sensitive to light touch and eventually. fat for insularity to maintain you warm.

The nephritic system
The kidneys are variety meats which are located toward the dorsum of our venters. The kidneys perform many critical maps which are of import in mundane life. For illustration. they help us acquire rid of waste merchandises by doing urine and egesting it from the organic structure. A particular system of tubings within the kidneys allows substances such as Na and chloride to be filtered. The kidneys regulate the sum of H2O in the organic structure. Humans produce about 1. 5 liters of urine a twenty-four hours. However. if we drink more H2O. we may bring forth more urine. On hot yearss. if we get dehydrated and sudate more. we may bring forth less urine. This is why we have to guarantee we imbibe more H2O than usual when the conditions is of at a higher temperature.

Ureter:
The ureters are paired muscular canals that carry urine from the kidneys to the vesica.

The vesica:
The chief map of the vesica is to hive away urine and. under the appropriate signals. let go of it into a tubing which carries the piss out of the organic structure. Normally. the vesica can keep up to 500 milliliter of piss.

Urethra
The male urethra is 18–20 centimeter long. running from the vesica to the tip of the phallus. This is where the urine flows from the vesica and out of the phallus. The female urethra is 4–6 centimeter long and 6 millimeters broad. It is a tubing running from the vesica cervix right to the vagina. As the female urethra is shorter than the male urethra. it is more likely to acquire infections from bacteriums in the vagina ; this is how adult females frequently suffer from H2O infections.

The generative system

The map of the reproduction system is to maintain the human race alive by enabling us to bring forth more progeny. The female generative system:

Ovaries ; The ovaries sit merely above the fallopian tubing. one ovary on each side of the womb. Every month during ovulation. either the right or left ovary produces a individual mature egg for fertilisation.

Fallopian tubings ; the eggs which have been released from the ovaries travel down these tubings. If the egg is fertilised by the sperm of the male this is where the fertilization procedure begins.

Uterus: this is where the fertilised egg will turn into a kid. The liner of the uterus thickens every 28 yearss in readying of the nidation of the embryo. If the embryo isn’t implanted the liner so breaks off and exits out of the vagina in the signifier of little blood coagulums this is known as the period.

Neck: During the females monthly rhythm the neck stretches open somewhat to let the liner of the womb to be shed. During childbearing. contractions of the womb will distend the neck up to 10 centimeter in diameter to let the kid to go through through.

Vaginas: The vagina is a muscular transition which forms a portion of the female sex variety meats and which connects the cervix of the womb. The walls of the vagina become engorged when a adult female is aroused as excess blood is pumped into the vass. The vagina has three maps: as a aggregation point for the sperm from the phallus during sexual intercourse ; as an mercantile establishment for blood during the monthly rhythm ; and as a passageway for the babe to go through through at birth.

Vulva: the vulva is the gap of the vagina. The vulva besides contains the gap of the female urethra. but apart from this has small relevancy to the map of micturition The male generative system:

Testiss: These are egg-shaped variety meats about the size of big olives that lie in the scrotum. secured at either terminal by a construction called the spermous cord. Most work forces have two testicles. The testicles are responsible for doing testosterone. the primary male sex endocrine. and for bring forthing sperm. Within the testicles are coiled multitudes of tubings called seminiferous tubules. These tubings are responsible for bring forthing sperm cells.

Epididymis: The epididymis is a long. coiled tubing that rests on the rear of each testis. It transports and shops sperm cells that are produced in the testicles. It besides is the occupation of the epididymis to convey the sperm to adulthood. since the sperm that emerge from the testicles are immature and incapable of fertilisation.

Vas Deferens: The vessel deferens is a long. muscular tubing that travels from the epididymis into the pelvic pit. to merely behind the vesica. The vessel deferens conveyances mature sperm to the urethra. the tubing that carries urine or sperm to outside of the organic structure. in readying for interjection. Prostate secretory organ: The prostate secretory organ is a walnut-sized construction that is located below the urinary vesica in forepart of the rectum. The prostate secretory organ contributes extra fluid to the semen. Prostate fluids besides help to nurture the sperm. The urethra. which carries the semen to be expelled during climax. runs through the Centre of the prostate secretory organ. Seminal cysts: The seminal cysts are pouches that attach to the vessel deferens near the base of the vesica. The seminal cysts produce a sugar-rich fluid that provides sperm with a beginning of energy to assist them travel. The fluid of the seminal cysts makes up most of the volume of a man’s ejaculatory fluid. During interjection this fluid is assorted with sperm making a substance known as seeds.

Urethra: The urethra is the tubing that carries piss from the vesica to outside of the organic structure. In males. it has the extra map of blurt outing seeds when the adult male reaches orgasm. When the phallus is vertical during sex. the flow of piss is blocked from the urethra. leting merely seeds to be ejaculated at climax. Penis: This is the male organ used in sexual intercourse. It has three parts: the root. which attaches to the wall of the venters ; the organic structure. or shaft ; and the glans. which is the conic portion at the terminal of the phallus. The glans. besides called the caput of the phallus. is covered with a loose bed of tegument called prepuce. The gap of the urethra. the tubing that transports seeds and piss. is at the tip of the phallus. The phallus besides contains a figure of sensitive nervus terminations. Semen is ejaculated through the terminal of the phallus when the adult male reaches sexual flood tide. When the phallus is vertical. the flow of piss is blocked from the urethra. leting merely seeds to be ejaculated at climax.

The Endocrine System
The map: uses chemicals to command facets of organic structure map. Chemicals are produced by hormone secretory organs which secrete them into the blood stream to make their mark cells.

Pituitary secretory organ: About the size of a pea. the hypophysis is found at the base of the encephalon. behind the span of your olfactory organ. The pituitary secretory organ is frequently called the maestro secretory organ because it controls several other hormone-releasing secretory organs such as the ovaries. suprarenal glands and testicles. The endocrines produced by this secretory organ are Adrenocorticotrophic endocrine. Follicle-stimulating endocrine. Growth endocrine. Luteinising endocrine. Melanocyte-stimulating endocrine. Prolactin. Thyroid-stimulating endocrine.

Pineal secretory organ: The pineal secretory organ is a pine cone shaped secretory organ of the hormone system. A construction of the interbrain of the encephalon. the pineal secretory organ produces several of import endocrines including melatonin. Melatonin influences sexual development and sleep-wake rhythms. The pineal secretory organs chief maps are Secretion of the Hormone Melatonin Regulation of Endocrine Functions Conversion of Nervous System Signals to Endocrine Signals Causes Feeling of Sleepiness Influences Sexual Development.

Thyroid gland: The thyroid secretory organ is a little secretory organ with two lobes. It is located in the forepart of your cervix. merely below the Adams Apple. The thyroid secretory organ produces two chief endocrines which are of import for growing and development. One is called tetraiodothyronine ( T4 ) and the other is called liothyronine ( T3 ) . T4 is converted to T3 in the body’s cells and tissues. T3 is an active endocrine and is needed by all of the cells and tissues of the organic structure. The thyroid secretory organ besides produces another endocrine called calcitonin. this works aboard parathyroid endocrine in the care of Ca degrees in the blood.

Parathyroid gland: this secretory organ is responsible for the control of the Ca degrees within the blood they produce a endocrine called parathyroid endocrine.

Stomach: this secretory organ produces endocrines which can state us if we are hungry or full these endocrines are called Gastrin endocrines. Adrenal secretory organ: this secretory organ produces the chemical epinephrine. norepinephrine and hydrocortisone. These endocrines can increase or diminish the bosom rate. These chemicals are produced in response to acute emphasis such as fear and choler. These cause the bosom to pump harder and the bosom rate to increase. They besides open air passages into the lungs. increase blood flow to major musculus groups and enable the organic structure to contend or run in a nerve-racking state of affairs. Noradrenalin is related to the sympathetic nervous system. Isles if Langerhans in pancreas: this secretory organ produces the endocrines insulin and glucagon insulin helps to modulate the glucose degree within the blood by cut downing it while glucagon additions it.

Ovaries/ testicles: the testicles produce the endocrine called testosterone which is responsible for the features within males it besides is needed to bring forth sperm. The ovaries produce endocrines called oestrogen and Lipo-Lutin. Oestrogen strengthens castanetss and has a protective consequence on the bosom. and Lipo-Lutin causes the womb’s liner to inspissate ready for gestation. The ovaries besides produce little sums of testosterone.

The lymphatic system
Function: an alternate circulatory system it besides plays a function in the immune system. Returns interstitial fluid from the tissues to the blood.
Transport the merchandises of fat digestion from the villi to the blood. Lymph vass: closed ended tubings that drain the tissues of extra blood. These tubings have valves which prevent back flow of fluids. This fluid is moved by force per unit area caused by musculuss squashing other tissues and indirectly pressing on the lymph vass. This caused fluid to travel easy compared to blood in the cardio vascular system. Lymph nodes: countries of connective tissue located at assorted locations along the lymph along the lymph vass ( particularly in the cervix arm cavities and inguen ) . They are “holding areas” for white blood cells. During an infection. many white blood cells may garner at that place to organize conceited secretory organs. Thymus: located in the upper thorax below the cervix. It is involved in doing a type of white blood cells these are known as T lymph cell. These will migrate through the lymph vass to wait in the lymph nodes. Spleen: located below the tummy it acts as a reservoir for blood.

The immune system
The map of the immune system is to contend infections and prevent diseases. The major constituents of the immune system are:
* Spleen
* White blood cells ; Lymphocytes. Granulocytes and Monocytes
* Thymus secretory organ
* Lymphatic vass and lymph nodes
* Pharyngeal tonsils
* Tonsils
* Other lymphoid tissue for illustration in the bowel
White blood cells are produced in the bone marrow and Thymus. They kill pathogens in a figure of ways such as: a ) Steeping –the cell surrounds the pathogen and so digests it. B ) Produce anti-bodies to:








I ) Kill the pathogen straight.
two ) Tag the pathogen to pull other white blood cells. degree Celsius ) Inject the pathogen with digestive enzymes to kill it.
Granulocytes are a type of white blood cells that has granules in their cytol. They besides circulate the blood until they get a signal that provides instructions. Monocytes make up between 1-3 % of the organic structures white blood cells. The lower the monocytes count is in a person’s organic structure the healthier they are. They can besides develop into a cell called macrophages which are cells that eat other cells. There are two chief types of lymph cells ; B and T cells. B cells produce antibodies that attack foreign molecules whereas T cells can assail the body’s ain cells when they are diseased for illustration if a cell is infected or invaded by malignant neoplastic disease.

The Thymus secretory organ produces T-lymphocytes ( T cells ) that fight off infections and unnatural cells. Lymphoid tissue is found in the variety meats of the lymphatic system for illustration the lymph vass and nodes. Lymphoid tissue contains lymphocytes that aid battle against infection ( play a function in the immune system ) . Adenoids contain lymph cells which make up 25 % of the white blood cells that are go arounding in the organic structure. Before the age of 3 pharyngeal tonsils are more active whereas after 5 old ages of age they start to go smaller. Tonsils gimmick bacterium and viruses that people may take a breath in and so the antibodies in the tonsils aid and kill them in return forestalling infections.

Mentions

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Btec wellness and societal attention degree 3 book 1 Beryl Stretch Mary Whitehouse ( 2010 ) pages

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