Examlex
Large animals like giraffes require less pressure than smaller animals do to move blood throughout their bodies.
Refract Light Rays
The bending of light as it passes from one substance into another substance that has a different density, a fundamental principle in optics.
Receptor
A protein molecule that receives and responds to chemical signals in the body.
Retina
A layer at the back of the eyeball containing cells sensitive to light, which trigger nerve impulses that pass via the optic nerve to the brain, where a visual image is formed.
Extraocular Muscles
The six muscles that control the movement of the eye and are located outside the eyeball.
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