Special Senses Quiz

Eyelids (palpebrae)

protect the front of the eye

palpebrae fissure- slit between the two eyelids & they come together at the corners of the eye

lacrimal caruncle

contains sebaceous & sweat glands

Conjuctiva

Thin, protective mucous membrane lining the

eyelids and covering the anterior surface of the eye itself

Lacrimal gland

continually releases tears into the superior part of the conjunctival sac

Ciliary body

Changes the shape of the lens to focus on objects at varying distances

Iris

Adjusts the diameter of the pupil to control the amount of light entering

Sclera

protects and shapes the eyeball, provides an anchoring site for the extrinsic eye muscles

Cornea

clear to allow light to enter the eye

• Contains many pain receptors which trigger

blinking

Choroid

Contains blood vessels that nourish the eye

Pupil

round opening at the center of the iris that

allows light to enter

Rods

dim-light and peripheral vision (part of neural layer- a photoreceptor)

Cones

bright light and color ((part of neural layer- a photoreceptor)

Lens

a transparent, flexible structure that can change shape to focus light on the retina