Break Down The Food You Eat Biology Essay

When you crunch into that bright ruddy, delightful apple, do you of all time inquire what really happens after you swallow it? You ‘ve frequently learned that staff of life, fruit, and veggies are good for you, while fats and sugars are bad, but did you of all time inquire why? The digestive system inside your organic structure is slightly of a medical wonder. The full system is designed to interrupt down the nutrient you eat into bantam spots of affair called molecules that can be absorbed into your blood to be taken where they are needed. This paper will detail how the digestive system works, every bit good as assorted malfunctions that could happen.

The digestive system is the lone major organic structure system that has one entryway into and one issue out of your organic structure. Initially, the nutrient is non in a signifier your organic structure can utilize. When you foremost get down your mouthful of nutrient, it does non profit your organic structure at all. Therefore, your organic structure must foremost interrupt it down and turn it into something your organic structure can utilize more efficaciously. Your organic structure can non bring forth all the foods it needs by itself, so it must treat foods from the outside universe. In kernel, this is why your digestive system exists.

We will write a custom essay sample on
Break Down The Food You Eat Biology Essay
or any similar topic only for you
Order now

Digestion is best defined as: “ The procedure by which nutrient and drink are broken down into their smallest parts so the organic structure can utilize them to construct and nourish cells, and to supply energy ” ( C ) . The digestive system contains the most single variety meats that contribute to the overall system. Aside from the circulatory system which benefits all variety meats in the organic structure, the first organ in this system is the oral cavity, which contains the lingua, dentition, and salivary secretory organs. The first measure in digestion is the first bite into whatever nutrient you put into your oral cavity. Teeth are specifically shaped for different maps: incisors, which are right at the forepart of your oral cavity, are meant to slit the nutrient into bite-size parts that your oral cavity can really manage. One brace of eyetooths behind the incisors are used to assist rupture the nutrient apart and assist both the incisors and grinders do their occupations. Behind the eyetooths, three braces of grinders so crush and squash the mass of nutrient, turning it into a pulp that your organic structure can digest. A 2nd measure of digestion in the oral cavity is the spit it produces. Saliva is a weak digestive enzyme

secretory organs in your oral cavity green goods to assist interrupt down the nutrient. With your dentitions squashing nutrient into bantam small spots, the spit so covers a greater surface country of the nutrient, and interrupting it down chemically. Besides a digestive organ, the lingua axial rotations around the mass of nutrient and, along with the spit, and turns the blob into a gluey bolus which is easy to get down. This is the one measure of digestion you somewhat command, and your organic structure takes digestion over from here.

The 2nd measure of digestion, which accomplishes really small, is get downing. Swallowing is a complicated series of musculus contractions, which involves barricading off both your nasal transitions and your windpipe, which leads to your lungs. The lingua so “ axial rotations ” the bolus into your throat, and it eventually leads into your gorge. Coated with mucose, the gorge is a hollow tubing of muscular tissue. The nutrient is pulled through the gorge to the tummy by a muscular gesture called vermiculation. No digestion happens inside the gorge ; the nutrient is simply transported. At the terminal of the gorge is a round muscular mass called a sphincter. This mass seals off the connexion between the gorge and the tummy, but opens up to allow boli of nutrient through.

The following organ in the digestive piece of land is the tummy, a J-shaped organ that can keep up to one liter of affair at one clip. This is non needfully the maximal capacity, but any more than this can be harmful to stomach tissue. The tissue of the tummy is thicker and more muscular than the gorge. Inside is a really thick liner of mucous secretion to protect the tummy from digestive juices. The juices inside the tummy are really a powerful acid, with a pH of about 2, about the same as battery acid. When the tummy has nutrient inside it, the muscular tissue begins to travel in a manner as to “ churn ” the nutrient indoors. While the tummy is churning, the nutrient is bathed in these digestive juices, and major chemical dislocation begins here, largely of proteins.

The last measure of digestion occurs in the little bowels. This long, cannular organ is tightly coiled up inside your venters, and this is where soaking up of foods occurs. By now, most of the nutrient is broken down into molecules that can really be used by your organic structure. The digested nutrient foliages


your tummy via a 2nd sphincter in a signifier called chyme. Chyme is a midst, black liquid that enters your bowels to be absorbed into your organic structure. At the really beginning of the little bowels is a subdivision called the duodenum. This subdivision receives digestive enzymes from the liver, gall bladder, and pancreas. The liver secretes bile salts that both interruptions down fatty stuffs into something the bowels can absorb, and increases the pH of the chyme so that the bowels are n’t burned or damaged. Bing largely a storage armored combat vehicle, the gall bladder secretes a minor sum of insulin to pull off the sum of sugar that enters the blood, and shops the gall that the liver makes until it is needed. The gall bladder is, in a manner, a non-essential organ because its occupation can be taken over by the liver. However, without it, the liver can be overworked. The pancreas secretes an enzyme to interrupt down saccharides into their basic molecules so they can be absorbed. All these secernments are introduced to the chyme in the duodenum.

The broken down chyme is so pushed through the bowels by vermiculation. The journey through the bowels is a really long one, because the bowels are filled with small hairs, called villi, that assistance in soaking up. Villi so sweep the chyme as it goes by, and begins to draw off molecules, which are directed to a blood capillary to be used in the organic structure. Covered in microvilli which absorb the nutrient molecules, the surface country of the bowels is increased by these two things.

Some types of nutrient can non be used by your organic structure at all. You may hold heard that fiber “ cleans you out. ” This is literally true, because fibre interruptions down really small inside your organic structure. The fibre is swept along with the remainder of the nutrient you eat, and pulls all the waste stuff out of your enteric piece of land. As good, the organic structure does n’t absorb everything, and some waste is created. Alternatively of go forthing it inside your bowels to decompose and do you vomit, you eat fiber to travel this waste out of your organic structure. This is where the colon is involved. The colon, or big bowels, is somewhat larger in diameter than the little bowels, and has no microvilli. The intent of the colon is to transport waste to a organic structure issue.

The colon besides moves the nutrient by vermiculation, and it wraps around the little bowel package from the


right side of your venters around the top – underneath your liver and tummy – down the left side,

and eventually around the underside for a short distance. The waste, or faecal affair, gathers here to be expelled out the anus in a intestine motion.

The digestive system secretes liquids, called enzymes. These enzymes are designed to interrupt down nutrient in certain parts of the organic structure. Each organ secretes its ain enzymes to help in digestion of the nutrient, and each of these enzymes is necessary for complete digestion.

The first digestive enzyme to interrupt down nutrient is in the spit in your oral cavity. This enzyme, called salivary amylase, is a really weak acid that aids in turning chewed nutrient into a bolus that can be swallowed. This amylase chiefly attacks amylum in nutrients to turn it into malt sugar, which will be farther digested inside the organic structure.

Once nutrient enters the tummy, stomachic juices so chemically interrupt down the bolus of nutrient into the chyme mentioned earlier. One enzyme in these stomachic juices is pepsin, produced to chiefly aim any protein inside the tummy. Pepsin is extremely acidic, and interruptions down the protein into peptides which can so be mixed into the chyme to be farther digested in the bowels.

The pancreas is greatly involved in releasing enzymes to interrupt down foods. To interrupt down sugars into glucose and fructose for soaking up in the bowels, the pancreas secretes pancreatic amylase. The pancreas besides secretes trypsin, which plays a minor function in the digestion of protein. Additionally, the pancreas secretes an enzyme called nuclease, which breaks down any Deoxyribonucleic acid and RNA found in the nutrient into bases. Nuclease digestion is digestion that occurs on a microscopic graduated table. This digestion is infinitesimal because this is literally affecting digestion of protein cells, which are highly little. The concluding enzyme the pancreas excretes is nucleosidases. This enzyme farther breaks down the bases into nucleic bases, sugar, and phosphate. These are so re-arranged to organize ATP for the organic structure to utilize. ATP is a little molecular construction that provides energy for the organic structure which it both uses in majority and recycles several times over.


The liver besides produces a digestive enzyme to utilize in digestion. The liver secretes bile salts,

which break down fat into fatty acids and cholesterin. These salts travel through the liver to the gall bladder, which so passes them on to the common gall canal where it is brought to the bowels.

The existent molecullar digestion occurs inside the little bowels. Aside from being the aggregation point for all the digestive enzymes from the other variety meats, the enteric piece of land besides produces its ain enzymes to help in molecullar digestion. The first enzyme that the bowels produce is maltase. This enzyme attacks any maltose molecules in the chyme, interrupting it down into glucose which can be absorbed into the blood. Another enzyme produced in the bowels is proteases. This enzyme breaks down peptides from the tummy into aminic acids, which can be used in the organic structure. After all these enzymes have been introduced to the chyme, the blood stream can absorb these foods, and administer them to wherever they are needed in the organic structure.

Not all enzymes related to the digestive piece of land are simply used for digesion, nevertheless. Several enzymes exist in other parts of the organic structure, which we call hormone regulators. These endocrine regulators aid in other things digestion-related, such as modulating blood flow, appetite, and many other things. The first endocrine is gastrin. When activated, this endocrine, tells the tummy to get down bring forthing digestive juices to get down the digestive procedure in the tummy. Gastrin besides plays a outstanding function in skin-cell and mucous membrane production in the tummy and bowels.

The following regulator in the organic structure is secretin. This enzyme causes the pancreas to bring forth a hydrogen carbonate enzyme, which helps neutralize the chyme. due to the low pH of the chyme, a lack in this enzyme could do utmost harm in the little bowels. Secretin besides stimulates the tummy to bring forth pepsin while digesting to get down interrupting down proteins. This enzyme besides causes the liver to egest gall salts into the digestive piece of land to interrupt down fats.

A 3rd endocrine regulator is called cholecytokinin ( CCK ) . CCK chiefly manages the pancreas, stating it when to bring forth its digestive juices to interrupt down saccharides in the bowels.


When old cells start to go damaged CCK besides stimulates cell growing in the pancreas. A 3rd thing

CCK manages inside the organic structure is exciting the gall bladder to empty, which sends gall salts through the common gall canal to the bowels. In this manner, the enzymes CCK and secretin walk hand-in-hand to digest certain foods in the organic structure.

Two different endocrines control appetite. The first endocrine, ghrelin, is produced in the tummy and little bowels in the absence of nutrient. This endocrine stimulates what we know as appetency. If we have n’t eaten for excessively long, this endocrine makes us hungry. Once we have eaten, a 2nd endocrine, peptide YY is produced, which neutralizes the ghrelin in our system, repressing our hungriness.

The digestive piece of land provides foods and energy vital to our endurance. The piece of land breaks down the foods: saccharides, protein, fats, vitamins, H2O, salt, and fibre. The exclusions to this are that salt and H2O are largely processed in the urinary piece of land, although they still pass through portion of the digestive piece of land. All signifiers of nutrition are digested by being chewed in the oral cavity and being broken down to the molecular degree inside the tummy. The undermentioned descriptions offer inside informations on the assorted foods your organic structure interruptions down.

Carbohydrates are utile to our system because, in short, they provide sugar and energy for our organic structure. There are several types of saccharides, but finally they break down into two simple carbs, sugar and amylum.

The digestible carbohydrates-starch and sugar-are broken into simpler molecules by enzymes in the spit, in juice produced by the pancreas, and in the liner of the little bowel. Starch is digested in two stairss. First, an enzyme in the spit and pancreatic juice breaks the amylum into molecules called maltose. Then an enzyme in the liner of the little bowel splits the malt sugar into glucose molecules that can be absorbed into the

blood. Glucose is carried through the blood stream to the liver, where it is stored or used


to supply energy for the work of the organic structure. ( C )

in one simple measure, sugars are digested and absorbed into the organic structure. The digestion of saccharose ( table sugar ) is broken down into glucose and fructose by an enzyme run alonging the little bowel. The liner of the bowel absorbs these two molecules, and transmits them to the blood stream for conveyance, usage, and storage.

Proteins are needed in our organic structure for edifice and mending tissues of the organic structure on a cellular degree. Obviously utilizing a ball of steak or a peanut as a band-aid to mend a cut wo n’t work, so the nutrient has to be broken down foremost. Protein is one of the most heavy digestible nutrients you can consume, and requires important attempt on your organic structure ‘s portion to interrupt it down. Pepsin, an enzyme in the tummy, combined with highly acidic stomachic juices, begins the interrupting down of protein. The bedraggled protein so enters the little bowel to be farther digested and absorbed. Both pancreatic enzymes and the enteric liner interrupt down the protein molecules into aminic acids. The amino acids are so absorbed into the blood to get down mending and strenghtening organic structure cells.

Fats are a far more heavy beginning of energy for the organic structure. When the organic structure is hungering, fat can besides assist in bring forthing a all right balance of organic structure insularity and can be a modesty beginning of energy. Fat has a alone digestive procedure, because the tummy ca n’t truly digest fats. Almost all digestion of fat is done in the bowels. Bile salts secreted from the liver are channeled to the little bowels via the common gall canal. These salts break down fat into molecules of fatty acids and cholesterin. The fat is absorbed through the enteric wall to supply energy for the organic structure, and extra fat is sent to storage receptors throughout the organic structure.

Vitamins are another indispensable food that must be brought from outside the organic structure. These are largely digested in the signifier of fruits and veggies, although other vitamins come from different beginnings.

Another critical portion of nutrient that is absorbed through the little bowel are vitamins. The


two types of vitamins are classified by the fluid in which they can be dissolved: water-

soluble vitamins ( all the B vitamins and vitamin C ) and fat-soluble vitamins ( vitamins A, D, E, and K ) . Fat-soluble vitamins are stored in the liver and fatty tissue of the organic structure, whereas water-soluble vitamins are non easy stored and extra sums are flushed out in the piss. ( C )

Fiber plays a alone function in the organic structure. The organic structure has no manner to clean out waste in the digestive piece of land. If this waste stuff is left inside the organic structure, it will finally decompose and get down damaging the enteric tissue, fundamentally moving as nonvoluntary nutrient toxic condition. Therefore, this decomposing nutrient must be removed from the organic structure in some manner. Hence, we digest fiber. Fiber is literally undigestible in the organic structure, and it passes through the system as a big bolus of waste. This can be moved with the vermiculation in your bowels, and will roll up all the waste inside your piece of land. Before making any harm, this can so be expelled from the organic structure.

Water and salt drama really minor functions in the digestive system. Some H2O is needed to avoid irregularity in the colon. Salts are needed to maintain diarrhoea from happening in the colon. As a beginning of Na, salts are good to the circulatory system.

The digestive system does fantastic things for our organic structure. This system breaks down and absorbs critical foods that our organic structure is losing, and it besides expels waste from our organic structure. Both of these maps are priceless. Unfortunately, if we eat an imbalanced diet consistantly, or by chance ingest toxic substances, serious harm to these variety meats can happen. The major disease that will be covered is an overview of hepatitis.

The inflammation of the liver is called hepatitis. Hepatitis can be transmitted by viruses, but it can besides be contracted by consuming excessively much intoxicant, drugs, or other toxic subtances. The disease itself is non really lifelessly, but the complications of hepatitis can be lethal. Some complications include cirrhosis, in which the liver becomes badly scarred and is unable to renew any longer. If left untreated long


plenty, hepatitis can evenually do entire liver failure, which is normally fatal.

Presently there are six categorizations of hepatitis: Hepatitis A, B, C, D, E, and F. All these categorizations mean that the liver was infected in a different manner, and your mentality and intervention will differ between types of hepatitis. 90 % or more of known hepatitis instances are either Hepatitis A, B, or C, which are all viral. This means that it is transmitted in the signifier of a virus that attacks the liver and organic structure tissues. There are two categorizations of viral hepatitis ; you will either acquire acute hepatitis or chronic hepatitis. Acute hepatitis is when the unwellness will be impermanent, so you will experience ill for a few hebdomads, perchance a month, but so your organic structure will retrieve. Chronic hepatits is far worse. You can be reasonably certain you have chronic hepatitis if you have been ill for six months or more, this means the unwellness will remain with you for a long clip, and more aggressive interventions must be used. Chronic hepatitis is besides contagious, and may re-emerge after old ages of being hibernating. From this position, chronic hepatitis is serious.

Both Hepatitis A and E step rather low on the badness graduated table. They are acute versions of the virus, and are contracted through managing faecal affair, consuming H2O with sewerage or other contaminations in it, or through consuming contaminated nutrient. Hepatitis A and E can non take to chronic unwellness, so this categorization of hepatitis is really easy to avoid.

Hepatitis B is the most common categorization of hepatitis to contract. As it can be dispersed really easy. This can be spread from female parent to infant, and is spread through any signifier of fluid transportation: sexual contact, managing contaminated blood, etc… Peoples with HIV are highly likely to contract chronic Hepatitis B, and Hepatitis B does far more harm in a individual infected with HIV. This disease is more important than Hepatitis A or E, but is still curable, every bit long as it isnt left long plenty to go a chronic disease.

Hepatitis C is known as the worst infection you can acquire, and is spread by straight reaching infected blood, normally by sharing drug acerate leafs or other injection tools. A little per centum of people


hold managed to distribute this infection through sexual contact, although this method of transportation is really

rare. Up to 85 per centum of people with Hepatitis C will contract chronic hepatitis. Hepatitis C is really bad because it can lie dormant up to fifty old ages before doing its presence known. This can ensue in serious liver harm because the infection was left untreated for so long.

Hepatitis D is largely a complication of Hepatitis B. The lone difference between the two is that the symptoms of Hepatitis D are visibly worse than in type B. The remedy and complication hazards are the same, merely with worse symptoms.

Presently, there are no medical remedies for Hepatitis A or E, but the organic structure ‘s immune system is more than capable of get the better ofing this disease within a few hebdomads. A choice few drugs used to bring around HIV can besides assist to bring around Hepatitis B and D. More drugs are being approved for usage to do the hardening of Hepatitis B and C a much easier procedure.

There are several easy methods of protecting yourself from any signifier of hepatitis. The most obvious is to merely remain clean and avoid contact with blood or used acerate leafs, because blood-to-blood transportation is the most common method of infection. You can candidly ne’er know if person is infected with hepatitis, so it is far better to merely remain safe. Besides, make your best to cognize where your H2O or nutrient is coming from, as contaminated nutrient or H2O can really easy reassign the disease. Condoms can be used to avoid undertaking hepatitis through sexual contact, although this is non 100 % foolproof. Vaccines can be taken to defy undertaking Hepatitis A, B, and C. Although other medical conditions may forestall you from acquiring these vaccinums, it is a good thought to acquire them, as they can bring around hepatitis if you get the vaccinum rapidly after exposure.

The digestive system is genuinely a admiration inside your organic structure. This system acts as the supplier of

foods your organic structure demands, and is critical to your endurance. If your organic structure did non hold a digestive system, you would decease within a few hebdomads, due to a entire deficiency of nutrition. Nutrition is what keeps your organic structure traveling, every bit good as supplying energy and stuffs for your cells to mend themselves. Without these two


critical things inside you, your organic structure would get down to fall apart, and you would be invariably tired. It is

besides critical that you protect this system, as the malfunctions that can happen in the system due to improper attention can be deadly. Hepatitis is merely a disease of the liver. Each organ in the digestive piece of land can contract its ain lethal diseases, many of which are more lifelessly than, or every bit lifelessly as hepatitis. Heed the warning, and take attention of your digestive system ; you are traveling to necessitate it for a long, long clip.


Hi there, would you like to get such a paper? How about receiving a customized one? Check it out