Sheep Eye Dissection

4/26/16

Sheep Eye Dissection Analysis

1. Observed outside of the eye. Identified fatty tissue, cornea, extrinsic muscles. Fatty tissue cushions the eye while in the socket. Cornea is for protection mostly. Extrinsic muscles help move the eye.
2. Identified optic nerve and sclera. Removed the fatty tissue and extrinsic muscle. Optic nerve connects to the brain and sends signals. Sclera is very tough and is what makes up the eye.
3. Made an incision halfway between cornea and optic nerve. Cut through sclera to open the eye. Identified lens, vitreous humor, choroid, blind spot, retina, tapetum lucidum. Lens focuses light on the retina. Vitreous humor helps the eye maintain its shape. Choroid brings blood with oxygen and nutrients to the eye. Blind spot is where the one spot where the retina is attached. Tapetum lucidum reflects light onto the retina.
4. Identified ciliary body and back of iris. Ciliary body helps change shape of the lens and secretes aqueous humor.
5. Removed vitreous humor and lens. Identified suspensory ligaments, lens, vitreous humor. Suspensory ligaments keep lens in place. 
6. Removed cornea. Identified iris, pupil, and aqueous humor. Iris regulates pupil size. Pupil controls how much light is let into the eye. Aqueous humor helps to also maintain shape of the eye.

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PC: Alexandria Tsao

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