Membranes and Glands

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Membranes and Glands
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Types of Glands

• Exocrine all glands with ducts
• Endocrine ductless glands (hormones)

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Apocrine Glands

• top of cell pinches off releasing contents
• some sweat glands (armpits and groin)
• cause scent when fatty acids and proteins in
  sweat metabolize
• become active at puberty
• Why do guys smell worse?

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Merocrine Glands

• Merocrine (eccrine) secretion by exocytosis
• Salivary glands and sweat glands (temp reg)

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Holocrine Glands

• Holocrine cell ruptures releasing contents
• sebaceous glands
• sebum

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Sweat Facts

• The average person had 2.6 million sweat glands
  in their integument.
• There are sweat glands distributed over the
  entire body---except the lips, nipples, and
  external genitalia.

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Mucous Membranes

• Mucous
• Line cavities open to exterior (nose, mouth, etc)
• Often secrete mucous

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Serous Membranes

• Occur in pairs
• Visceral lines organs
• Parietal lines body cavities
• used to avoid friction
• lines cavities closed to exterior
• secrete serous fluid lubricant

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