Question

explain how our ears help us to hear sounds make labelled diagram of human ear

Answer 1

When a sound is made.. Then out side part or the ear pinna will direct the sound into the ear drum through the external auditory canal. When the sound wave touches the ear drum or tympanic membrane it starts vibrating and then the vibration spread to the 3 small bones near to the ear drum which are malleus incus and stapes and called ossicles.. This ossicles in the middle ear amplify the sound a little.
This vibration of ossicles reaches the inner ear thorough the oval window and reach the cochlea which is known as the organ of hearing. There are inner hair cells and outer hair cells in the inner ear and it picks up the sound and then transfer to the brain through the 8th cranial nerve known as the vestibulocochlear nerve and then auditory area in the Brian analyse sound and there by we hear and understand the sound.

Answer 2

ᴀɴsᴡᴇʀ࿐

ᴛʜᴇ ᴇᴀʀ ᴄᴀɴ ʙᴇ ʙʀᴏᴀᴅʟʏ ᴄʟᴀssɪғɪᴇᴅ ɪɴᴛᴏ ᴛʜʀᴇᴇ ᴘᴀʀᴛs

ᴏᴜᴛᴇʀ ᴇᴀʀ:- ᴛʜᴇ ᴇᴀʀ ᴅʀᴜᴍ ᴠɪʙʀᴀᴛᴇᴅ ᴡʜᴇɴ ᴛʜᴇ ᴇᴀʀ ᴅʀᴜᴍ sᴏᴜɴᴅ ᴡᴀᴠᴇs sᴛʀɪᴋᴇ ɪᴛ ᴀɴᴅ ᴛʀᴀɴsᴍɪᴛs ᴛʜᴇ sᴏᴜɴᴅ ᴛᴏ ᴛʜᴇ ᴍɪᴅᴅʟᴇ ᴇᴀʀ.

ᴍɪᴅᴅʟᴇ ᴇᴀʀ:- ᴛʜᴇ ᴛʜᴇ ᴛʜʀᴇᴇ ʙᴏɴᴇs ᴀʀᴇ ᴘʟᴀᴄᴇᴅ ɪɴ sᴜᴄʜ ᴀ ᴡᴀʏ ᴛʜᴀᴛ ᴛʜᴇʏ ᴍᴏᴠᴇ ᴡʜᴇɴ ᴛʜᴇ ᴇᴀʀ ᴅʀᴜᴍ ᴠɪʙʀᴀᴛᴇs ᴀɴᴅ ᴛʜᴇ ᴛʜᴇʀᴇғᴏʀᴇ , ᴛʀᴀɴsᴍɪᴛs ᴛʜᴇ ᴠɪʙʀᴀᴛɪᴏɴ ᴛᴏ ᴛʜᴇ ɪɴɴᴇʀ ᴇᴀʀ.

ɪɴɴᴇʀ ᴇᴀʀ:- ᴛʜᴇ ʜᴀɪʀ ᴏғ ɪɴɴᴇʀ ʜᴀɪʀ ᴛʀᴀɴsғᴏʀᴍ ᴛʜᴇ ᴠɪʙʀᴀᴛɪᴏɴs ɪɴᴛᴏ ᴇʟᴇᴄᴛʀɪᴄᴀʟ ɪᴍᴘᴜʟsᴇs , ᴡʜɪᴄʜ ᴀʀᴇ ᴛʜᴇɴ ᴛʀᴀɴsғᴇʀʀᴇᴅ ᴛᴏ ᴛʜᴇ ʙʀᴀɪɴ ᴠɪᴀ ᴛʜᴇ ᴀᴜᴅɪᴛᴏʀʏ ɴᴇʀᴠᴇ.