Gland

A gland is a group of cells that prepare and release a chemical for use by the body.[1] There are two broad classifications of glands:

* Endocrine glands secrete their chemicals directly into the blood stream.
* Exocrine glands secrete through a duct.

## References[edit]

1. ↑ Wile, Dr. Jay L. Exploring Creation With General Science. Anderson: Apologia Educational Ministries, Inc. 2000