STRUCTURE AND FUNCTIONS OF PARTS OF HUMAN EAR.
The Mammalian Ear
The mammalian ear performs two major functions:
Hearing and detecting changes in the positions of the body to bring about balance and posture.
The ear is divided into three sections.
The Outer Ear
This consists of:
An outer flap, the pinna which is made up of cartilage.
The function of the pinna is to catch and direct sounds.
The external auditory canal is a tube through which sound travel.
The lining of the tube secretes wax, which traps dust particles and microorganisms.
The tympanum is a membrane stretching across the inner end of the external auditory canal.
The tympanum vibrates when it is hit by sound waves.