Sensory System - Structures and Functions

the mucous membrane that covers the front of the eye and lines the inside of the eyelids

• Conjunctiva 
• Lacrimal gland 

makes tears

• Conjunctiva 
• Lacrimal gland 

Layer of the eyeball that:
-is outer most
-is white 

• Sclera 
• Choroid 
• Retina

Layer of the eyeball that:
-is in the middle
-is vascular (supplies blood to eye) 

• Sclera 
• Choroid 
• Retina

Layer of the eyeball that:
-is innermost
-has light-sensitive cells (rods and cones)
-light focuses on 

• Sclera 
• Choroid 
• Retina

•“window of the eye” •Clear circular area at front of sclera

• cornea 
• iris
• pupil
• lens

colored muscular part

• cornea 
• iris
• pupil
• lens

circular opening where light enters

• cornea 
• iris
• pupil
• lens

•biconvex disc that changes shape to help focus at different distances

• cornea 
• iris
• pupil
• lens

light sensitive cells on the retina that are active in dim light - do NOT see color

• rods
• cones
• optic disk
• macula