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BSC 2094L

The Special Senses

TermDefinition
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