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Gland

From Biology-Online Dictionary | Biology-Online Dictionary
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Gland

(Science: anatomy) organ specialised for secretion by the infolding of an epithelial sheet.

The secretory epithelial cells may either be arranged as an acinus with a duct or as a tubule. Glands from which release occurs to a free epithelial surface are exocrine, those that release product to the circulatory system are endocrine glands.