-the body system which surrounds you
-the system that can instantly tell us whether someone is old or young their ethnicity or race
-made up of hair, skin, naild, glands or nerves
-main function is to protect the inside of your body from the elements in the env. Ex, bacter, pollution, r UV rays
-importance is to guard the body that provides a barrier to infection and shielding our body against temperature changes and adverse effects of potentially harmful substances such as uv
Thickest is found in feet
Thinnest found in eyelids