With the help of illustration, describe structure of ear and hearing process
Answers
Answer:
Explanation:
structure of ear
outer ear-
The external part of the ear consists of the pinna and ear lobe.
The pinna or ear shell is the shell-like part of the external ear, and it is made of cartilage and skin. The pinna directs sound waves from the outside into the external auditory canal (ear canal), which in turn channels sound waves to the tympanic membrane (known as the eardrum), causing it to vibrate. The tympanic membrane is a thin, semi-transparent, flexible membrane that separates the outer and middle ear.
The outer ear functions to collect sound (acoustic energy), and funnel it to the eardrum (tympanic membrane).
The middle ear
The middle ear is an air-filled space that contains three tiny bones known as ossicles which transmit sound. The bones are known individually (according to their shapes) as the:
1.Malleus (hammer).
2.Incus (anvil).
3.Stapes (stirrup)
The inner ear
The delicate membranous inner ear (labyrinth) is enclosed and protected by a bony chamber that is referred to as the bony labyrinth. The inner ear contains two main structures:
The cochlea, in the shape of a snail, which is involved in hearing. The round window (fenestra cochlea) is a membrane that connects the cochlea to the middle ear. It helps dampen the vibrations in the cochlea.
The vestibular system (consisting of the semicircular canals, saccule and utricle), which is responsible for maintaining balance and a sense of position.