/0/6728/coverbig.jpg?v=8479bfaba1b9fd0dfac8fd39b667793e)
In our study so far we have been concerned mainly with the introduction of materials into the body. We are now to consider the removal of materials from the body. The structures most directly concerned in this work are known as
Glands.-As generally understood, glands are organs that prepare special liquids in the body and pour them out upon free