There are some lower animals which breathe with their skins altogether.

A frog can breathe with its skin so well that it can live for some time after its lungs have been removed.

Breathing is an important part of the work of the skin, and we should be careful, by keeping it clean and healthy, to give it a good chance to breathe all that it can.
(3) _The Skin Absorbs._--The skin absorbs many substances which come in contact with it, and hence should be kept clean.

If the foul substances which are removed in the sweat are allowed to remain upon the skin, they may be taken back into the system and thus do much harm.
(4) _The Skin has Feeling._--When anything touches the skin we know it by the feeling.

We can tell a great many things about objects by feeling of them.