Hearing
Study the text and do the assignment below:
The parts and their functions in the order the information about sound travels through: Pinna - Acts as a kind of funnel which assists in directing the sound into the auditory canal. Auditory canal - Transmits sound from the pinna to the eardrum. Eardrum - A membrane at the end of the auditory canal. Its is extremely sensitive and pressure from sound waves makes the eardrum vibrate. Hammer - First of three bones in the middle ear. The bones in the middle ear amplify the sound. Anvil - Second of three bones in the middle ear. The bones in the middle ear amplify the sound. Stirrup - Third of three bones in the middle ear. The bones in the middle ear amplify the sound. Oval window - This membrane recieves vibrations from the stirrup and covers the entrance to the cochlea. The oval window makes the fluid in the cochlea move. Cochlea - Transforms sound waves into electrial impulses which are sent to the brain through the auditory nerve. Auditory nerve - A bundle of nerve fibres that carry information between the cochlea and the brain. Organs of balance - Has no function in hearing. These organs make sure we are able to keep balance. Eustachian tube - Has no function in hearing. Makes sure the pressure on the outside of the eardrum stays the same as the pressure on the inside.
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Do you now the parts of the ear? Test your knowledge with the assignment below: