They breath air through a hole on the top of their head called a blowhole.
Blowhole
mouth
The mouth.
its fin because it paddles with it.
the air hole on top of their head
The genitals
Their lungs and diaphragm
The hair shaft is the part of the hair that you see on the surface of skin .
Structural because it is a part of their body.
use their tales
Hair shaft
The hair shaft extends from the hair papilla to the body surface. It is made up of keratinized cells that form the visible part of the hair.