Question

explain the structure of human ear with diagram​

Answer 1

Answer:

The outer ear consists of the visible portion called the auricle, or pinna, which projects from the side of the head, and the short external auditory canal, the inner end of which is closed by the tympanic membrane, commonly called the eardrum. ... The middle ear is a narrow air-filled cavity in the temporal bone.

Answer 2

We are able to hear sounds from our surrounding through the sensory organ called ear. when the sound propagating through air, reches our ear, we are able to hear it. Let us study the structure of human ear and understand how how it enables us to hear sound.

Human ear is divided into three parts.

• Outer ear or External ear
• Middle ear
• Inner ear

(a) Outer Ear :

It consists of a flap like cartilaginous structure called pinna, One on each side of your face. It connects sound waves. The pinna is further connected to ear cannel at the end, where the Eardrum is the present. Eardrum is a stretched membrane that is separate the outer ear from the middle ear.

(b) Middle Ear :

It consists of a chair of three bones : hammer, anvil and Stirrup. Hammer is connected to a Eardrum and the innermost bone stirrup is connected to the inner ear. These three bones are named according to their shapes and are collectively called ossicles. Middle ear is connected to the throat through eustachian tube.

(c) Inner ear :

The inner ear contains cochlea and semicircular canals. cochlea is a spirally coiled tube and looks like a snail cell. It is filled with the fluid and has many hair cells inside it. the recepetors and impulses through sensory neurones to the auditory nerve which connects inner ear to the Brain.

The following Steps shows the working of the human ear :

1. Pinna colects sound waves from the surroding and send them to the ear drum through ear canal.
2. When sound waves fall on the Eardrum they make the eardrum to vibrate. The three bones (hammer, anvil and stirrup) eceive the vibration from the eardrum and amplify them.
3. Cochlea receaves the amplified vibration from three bones.
4. The sensitive hair cell Present in the cochlea convert them into nerve cell.
5. The nerveare carried to the brain through auditory nerve.
6. Brain decodēs nerve impulses into specific sounds.