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Chapter 15a - The Special Senses, the Eye and Vision

Terms in this set (63)

Special Senses
Special sensory receptors that have localized receptor cells in head.
Special Senses: Types (5)
1. Vision
2. Taste
3. Smell
4. Hearing
5. Equilibrium
How many receptors in eye? Visual processing where?
-70% of all sensory receptors in the body.
-The visual processing is done by half of the cerebral cortex
What protects the eye?
A cushion of fat and a bony orbit
Accessory Structures of the Eye
Protect the eye and aid eye function

1. Eyebrows
2. Eyelids (palpebrae)
3. Conjunctiva
4. Lacrimal apparatus
5. Extrinsic eye muscles
Eyebrows
Shade eye from sunlight, and prevent perspiration from reaching eye
Eyelids
Protect anteriorly, meet at medium and lateral commissures.
Lacrimal caruncle
support connective tissue
Tarsal plates
support connective tissue
Eyelashes
nerve endings that initiate blinking
Tarsal (Meibomian) glands
modified sebaceous glands that is oily secretion and lubricates the lid and eye
Ciliary glands
between hair follicles and are modified sweat glands
Conjunctiva
transparent mucous membrane that produces a lubricating mucous secretion
Palpebral conjunctiva
lines eyelid
bulbar conjunctiva
cover white of eyes
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