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BSC 2094L
The Special Senses
| Term | Definition |
|---|---|
| Obicularis Oculi | Closes the eyelids |
| Lateral and Medical Canthus | the junction where the upper and lower obicularis oculi muscle meets |
| Canuncle | fleshy elevation at the medial canthus that produces an oily secretion |
| Palpebrae | eyelid |
| Levator Palpebrae | elevated the eyelids |
| Conjunctiva | Continuous clear mucous membrane that line internal surface of the eyelid (Palpebral) and the anterior surface of the eyeball (Bulbar) |
| Conjuctivtis | Inflammation of the conjunctiva |
| Lacrimal Gland | Gland that secretes tears |
| Lacrimal sacs | empties tears into nasolacrimal duct |
| Nasolacrimal duct | empties tears into inferior meatus of nasal cavity |
| Ciliary Gland | sweat gland between eyelash hair follicles |
| Tarsal Gland | Large sebaceous gland found posterior to hair follicles |
| Sty | Inflammation of the cilary or small sebaceous gland |
| Lateral rectus | Moves eye laterally controlling abducens |
| Medial retus | moves eye medially oculomotor |
| Superior retus | Elevates eye |
| Inferior rectus | Depresses eye |
| Inferior oblique | Elevates eye and turns it laterally |
| Superior oblique | Depresses eye and turns it laterally |
| Tunics | internal layers of the eye |
| What is the average diameter of the human eye? | 2.5 |
| Lacrimal Punctum | the openness above the eye |
| 6 muscles | in the human eye |
| How many rectus muscles | 4 |
| Tunics | internal layers of the eye |
| Neural layer | contains the photorecptors (Rods and cones) which detect light |
| Optic Disc | the area of the eye where the optic nerve leaves eyeball (blindspot) |
| Macula lutea | area of high cone density (yellow spot) |
| Iovea Centralis | a pit in the macula lutea about 0.4mm in diameter where greatest visual acuity occurs |
| Vitreous body or humor | is a gel-like substance that fills the poster segment of the eye |
| Lens | focuses light toward retina |
| Ciliary zonule | holds the lens in place |
| Cataracts | when the lens become increasingly hand and opaque |
| Glaucoma | pain and possible blindness caused when intramuscular pressure reaches dangerously high levels |
| Fibrous | dense avascular connective tissue |
| Sclera | opaque white's of the eye |
| Cornea | transparent portion |
| uvea (middle) | Vascular connective tissue |
| Choroid | blood rich nutritive layer containing a dark pigment |
| Ciliary body | contains muscles which change the shape of the lens |
| Ciliary process | Secretes the aqueous solution which empties into the eye providing pressure and nutrients on the lens |
| Sceleral venous sinus | drains the aqueous solution in the anterior chamber into lacrimal punctum |
| Iris | most anterior part of the uvea which separates the eye into anterior and posterior segments |
| Pupil | Rounded opening which light passes through |
Created by:
TChavers
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