Reference Terms
from Wikipedia, the free encyclopedia

Gland

A gland is an organ in an animal's body that synthesizes a substance for release such as hormones, often into the bloodstream (endocrine gland) or into cavities inside the body or its outer surface (exocrine gland).

Every gland is formed by an ingrowth from an epithelial surface.

This ingrowth may from the beginning possess a tubular structure, but in other instances glands may start as a solid column of cells which subsequently becomes tubulated.

Note:   The above text is excerpted from the Wikipedia article "Gland", which has been released under the GNU Free Documentation License.
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July 5, 2015

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