Question

What is pinna? How do animals without pinna hear?

Answer 1

the outer ear is called pinna it collects the sound from surrounding.. the collected sound passes through the auditory cannal... at the end of auditory canal there is a thin membrane called the ear drum or tympanic membrane

Answer 2

Answer:

Pinna is a projecting lobe-like part of external ear which simply provides a passage from auditory canal leading to the ear drum. Pinna provides another example of a vestigial organ.