Write a short note on Human ear.
Answers
★ Structure of the Human Ear
$\longrightarrow$ The human ear is divided into three sections, those are the outer ear, the middle ear, and the inner ear.
The Outer Ear –
$\longrightarrow$ The outer ear is consisting of the pinna and the ear lobe. Pinna is cartilaginous and it directs the sound wave towards the external auditory canal.
$\longrightarrow$ The external auditory canal channels the sound to the tympanic membrane. In general, the tympanic membrane is called the eardrum.
$\longrightarrow$ The tympanic membrane is thin and semi-transparent.
The Middle Ear –
$\longrightarrow$ The middle ear consists of three tiny bones and it is filled with air. The bones are known as ossicles.
$\longrightarrow$ The three bones of the middle ear are named malleus, incus, and stapes. Sound vibration on the tympanic membrane is transmitted further by these three bones.
The Inner Ear –
$\longrightarrow$ The inner ear or, the labyrinth consists of two main structures. The structures are the cochlea and the vestibular system.
$\longrightarrow$ The main function of the cochlea is to help in hearing.
$\longrightarrow$ The vestibular system consists of 3 semi-circular canals, saccule, and utricle.
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The ear is the organ of hearing and, in mammals, balance. The outer ear consists of the pinna and the ear canal. Since the outer ear is the only visible portion of the ear in most animals, the word "ear" often refers to the external part alone. The middle ear includes the tympanic cavityand the three ossicles.