Exocrine Glands - Note"acinar" used...

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Exocrine Glands - More numerous and diverse Secrete products through ducts onto the body surface or into body cavities. Include sweat and oil glands, salivary glands, liver, pancreas, mammary and mucus glands. Unicellular Exocrine Glands: Single cells interposed in an epithelium between cells with other functions. In humans, all such glands produce mucin (forms mucus when dissolved in water). The only important unicellular glands in humans are goblet cells. Multicellular Exocrine Glands The glands can be described according to their structure of their secretory parts: tubular - secretory cells forming a tube, alveolar - secretory cells forming small flasklike sacs, tubuloalveolar - contain both tubular and alveolar units
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Unformatted text preview: Note: "acinar" used interchangeably with "alveolar" Mode of Secretion Most exocrine glands are merocrine - secrete their products by exocytosis shortly after the products are produced. Examples are the pancreas and most sweat and salivary glandsSecretory cells of holocrine glands accumulate their products within them until they rupture. Cells are replaced by division of underlying cells. Examples are the sebaceous oil glands. Apocrine glands accumulate their products just beneath the free surface. Eventually the apex of the cell pinches off end the secretion is released. The cell repairs itself and the process is repeated again and again....
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