Glands and Membranes

· Glands

– Exocrine: secretion into a body cavity or onto a body surface

– Endocrine: secretion into the ECF

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· Modes of secretion

– Merocrine: secretion by exocytosis

– Apocrine: secretion by loss of cytoplasm

– Holocrine: secretion through loss of entire cell

· Exocrine Gland Structure

– Unicellular

– Multicellular

§ Secretory sheets

§ Tubular

§ Alveolar (Acinar)

§ Tubuloalveolar

· Membranes

– Mucous membranes (mucosa): line cavities that communicate with the exterior

– Serous membranes (serosa): line internal cavities

– Synovial membranes: line synovial cavities