colorful area around the pupil that moves to enlarge or shrink the pupil
takes in oxygen and gives off carbon dioxide
hole in the eye that lets in light
Carries blood away from the heart to the rest of the body
carries the nerve signals from teh ear to the brain
hammer, anvil and stirrup
carries blood to the heart
Organ below the lungs that pulls air in as it constricts and pushes air out as it relaxes
carries the nerve signals from the eye to the brain
over 630 in adult body
divided into 4 lobes
part of the eye tha changes the light received into nerve signals tha the brain can read
light travels through it and is focused onto the retina
main organ of circulatory system; pumps blood
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