Chapter 15 Special Senses Part 1 Vision

Chapter 15 Special Senses Part 1 Vision - Special Senses...

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Special Senses Chapter 15 Part 1 Vision Angela Peterson-Ford, PhD [email protected]
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Eye and Associated Structures 70% of all sensory receptors are in the eye Most of the eye is protected by a cushion of fat and the bony orbit Accessory structures include eyebrows, eyelids, conjunctiva, lacrimal apparatus, and extrinsic eye muscles
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Eyebrows Coarse hairs that overlie the supraorbital margins Functions include: Shading the eye Preventing perspiration from reaching the eye Orbicularis muscle – depresses the eyebrows Corrugator muscles – move the
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Palpebrae (Eyelids) Protect the eye anteriorly Palpebral fissure – separates eyelids Canthi – medial and lateral angles (commissures)
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Palpebrae (Eyelids) Lacrimal caruncle – contains glands that secrete a whitish, oily secretion (Sandman’s eye sand) Tarsal plates of connective tissue support the eyelids internally Levator palpebrae superioris – gives the upper eyelid mobility
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Palpebrae (Eyelids) Eyelashes Project from the free margin of each eyelid Initiate reflex blinking Lubricating glands associated with the eyelids Meibomian glands and sebaceous glands Ciliary glands lie between the hair follicles
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Palpebrae (Eyelids) Figure 15.1b
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Conjunctiva Transparent membrane that: Lines the eyelids as the palpebral conjunctiva Covers the whites of the eyes as the ocular conjunctiva Lubricates and protects the eye
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Lacrimal Apparatus Consists of the lacrimal gland and associated ducts Lacrimal glands secrete tears Tears Contain mucus, antibodies, and lysozyme
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This note was uploaded on 01/06/2012 for the course BIOL 2401 taught by Professor Elainefanin during the Spring '11 term at Collins.

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Chapter 15 Special Senses Part 1 Vision - Special Senses...

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