The human ear is an organ of hearing and balance. It is called as
statoacoustic organ. It has three parts; external ear, middle ear and inner
ear.
External ear: - The external ear consists of two
parts; pinna and auditory canal.
The pinna or helix or auricle is present on the side of head
and is broad cartilaginous structure. Its posterior end without cartilage is
called as lobule. Its hollow centre is called as concha. Its movement is
regulated by auricular muscles which is vestigial in human.It collects,
receives sound wave and sends the sound waves into the auditory canal.
