Question

III.State the difference between the two (AS 1)
1. Rods and cones
2. Iris and Pupil
3. Pinna and Tympanum
4. Nasal cavity and Ear canal​

Answer 1

Pinna

It is the external structure of the ear made of skin and elastic cartilage. Its functions is to collect sound waves and direct them into the auditory canal inside the ear.

Tympanum

It is the membranous structure that separates the external ear from the middle ear. Its function is to transmit the sound waves which strike on it to the inner parts of ear

Nasal cavity

It helps in smelling.

It helps in smelling. It acts as a barrier for dust particles.

Ear canal

It helps in hearing

It also helps in balancing

Answer 2

Answer:

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