7th grade Body systems Review

Term Definition
Bile The enzyme that the liver produces
Pupil The opening in the eye that allows light to enter
Urethra The tube that carries urine from the bladder out to the outside
Bladder The place where urine is stored
Hydrochloric Acid The acid in the stomach
Kidneys Blood is filtered in these organs
Olfactory Special cells that aid in the sense of smell
Pyloric Valve The valve that is between the stomach and the small intestine
Mechanical Chewing is this form of digestion
Chyme The thin watery fluid that food becomes in the stomach
Stimulus Any change inside or outside the body that brings about a response
Optic nerve The type of nerve that carries visual signals to your brain
Colon A common name for the large intestine
synapse The small space between neurons
Cerebellum The part of the brain that controls voluntary muscles
Peristalsis The muscular action that moves food through the digestive tract
Ureter The tube that carries wastes from the kidneys to the bladder
Retina Eye tissue that is composed of rods and cones
Mucus This is something that you swallow that protects the stomach wall
Auditory Nerve The type of nerve cells that carry sound signals to the brain
Axon Carries messages away from the neuron cell body
Esophagus Sometimes called the food tube
Dendrites Receives neuron messages and sends them to the cell body
Cerebrum The largest part of your brain
Reflex Involuntary, automatic response to a stimulus
Lens Focuses images onto the retina
Iris Muscle wrapped around the pupil which also gives eyes their color
Tendon Thick bands of tissue that attach muscles to bone
Marrow The place in the bone where cells are made
Vertebrae The bones that protect the spinal cord
Periosteum The tough outer layer of bone
Hinge Your knees and ankles are this type of joint
Compact The hardest layer of bone
Quadracep The muscle in front of your femur
Clavicle The collar bone
Femur The thigh bone
Cartilage The natural shock absorbers for your bones
Immovable The type of joints in your skull and pelvis
Humerus The bone in your upper arm
Involuntary Muscles that work automatically without thought
Joint Where bones meet or come together
Cornea The front outer surface of your eyeball
Ligaments Bands of tissue that keep joints in place
Minerals The substances that make bones harden
Tricep The muscle that contracts when you straighten your arm

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