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exocrine gland(ĕk`səkrən): see glandgland,
organ that manufactures chemical substances. A gland may vary from a single cell to a complex system of tubes that unite and open onto a surface through a duct. The endocrine glands, e.g.
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in animals and humans, a gland that secretes the substances it forms through ducts onto the surface of the body or of mucous membranes or into a cavity. Exocrine glands include the sebaceous, salivary, sweat, mammary, lacrimal, and musk glands, as well as the liver, glands of the gastrointestinal tract, and other glands that release secretions into the alimentary canal.