they don't have one
It' a fungi called KERATIN. Visually, it is the bumpy stuff on the outer covering of a tadpole.
Sheggear arabeggear!
The outer covering of a prawn in a shell.
The integumentary system consists of the body's outer covering, also known as skin.
it is a scaly outer covering i think
Stupit
skin
A hard outer covering protects an insect's soft body and gives the insect its shape.
Wombats have a covering of stiff, coarse hair.
No
They have shells to protect them from their enemies.
Commonly known as skin.