Question

Describe the three layers of the eye and their functions.

Describe the three divisions of the ear and their functions.

Describe the general structures and functions of the taste and smell senses

Answer 1

1) The three layers of eye and their functions are given below,

• Sclera - outermost layer of the eye and protects the inner structures
• Choroid - rich in blood vessels and supplies nutrition
• Retina - photoreceptor layer, cobsudered as sensory layer of vision

2) The three divisions of ear and their functions are listed below,

• External ear - helps in conduction of sound
• Middle ear - balances pressure and amplifies sound waves
• Inner ear - helps in transmission of sound impulse to brain

3) Olfactory receptors are present in nasal epithelium and gustatory receptors are seen in tongue. They are involved in perception and transmission of smell and taste respectively.