Eye Anatomy Lesson

What are the senses

Somatic senses

●touch

●sound

●smell

●taste

Special senses

●smell

●sight

●taste

●hearing & balance

Receptors

Mechanoreceptors = touch

thermoreceptors = temperature

nocireceptors = pain

chemoreceptors = chemicals

photoreceptors = light

Pathway of eye

1.

Light enter eye through

cornea and pupil

2.

light passes lens next

3.

light hits optic nerve and

then the brain

Pathway of ear

1.

Sound waves come into the

outer ear (auditory canal)

2.

sound hits tympanic

membrane

3.

sound passes along with the

ossicles and is amplified

4.

sound hits cochlea and is
turned into electrical pulses

5.

auditory nerve transfers these

pulses to the brain

Diseases and disorders

Cataracts cause your eye(s) to be cloudy

Tinnitus is caused by loud sounds and causes
ringing

Covid can cause you to lose smell and or taste.

Functions

●The function of the senses is

so we can perceive

●A reflex arc is the path way of

the reflexes

Involving

1.

Receptors

2.

Sensory neurons

3.

Integration

4.

motor neurons

5.

effector