Wow...I can't believe you asked that... SKIN
The skin of a pig is the outer covering. It is similar to the skin of the human and as sensitive.
Commonly known as skin.
what is seahorse outer-covering
The outer covering of the eyeball is cornea.
Amphibians do not have outer covering.
The fibrous tunic is the outermost layer of the human eye. In specific areas are the sclera, or "white of the eye", and the cornea which is continuous of the sclera.
Epithelial tissue
Bat is a mammal, so it's outer covering is hair whereas bird's outer covering is feather.
A seals outer covering is thick skin.
an ant's outer covering is their exoskeleton
Tonoplast is the outer covering of vacuole
Camels have hair as their outer covering.