conjunctiva
membrane that lines eyelids
lacrimal glands
releases tears (moisten and protects eyes)
sclera
protective white part on eyeball
cornea
clear central part where light enters the eye
iris
pigmented part
pupil
rounded opening of iris where light passes through
retina
thin tissue in back of the eye (photoreceptors are here)
lens
biconvex structure that focuses light on retina
optic nerve
group of axons carry info from retina to brain
Auricle
shell shaped around opening
Auditory canal
glands secrete ear wax
Tympanic Membrane (eardrum)
vibrates to amplify sound waves
Middle Ear
air filled cavity with small bones (transmit vibrations)
Eustachian Tube
controls pressure in middle ear
Inner ear
bony labyrinth (with fluid)
Cochlea
spinal cavity with hair cell receptors
Olfactory Receptors
sense of smell (nasal cavity)
Taste Buds
sense of taste on mouth (tongue)