Letter E

Exocrine

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Pertaining to the secretion of a substance out through a duct.

The exocrine glands include the salivary glands, sweat glands and glands within the gastrointestinal tract.

Exocrine is as opposed to endocrine which refers to the secretion of a substance (a hormone) into the bloodstream.

The exocrine glands are the 'glands of external secretion' while the endocrine glands are 'glands of internal secretion.

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