Structure and Function of Sweat Glands

Wikis > Dermatology > Structure and Function of Sweat Glands

Sweat/Sudoriferous Glands

Apocrine Gland:
Commonly thought to be region specific (axilla, mammary line, eyelid, ear) – but it is found wherever hair is present  found everywhere except for acral skin of hand and foot.
Develop between 15-20 weeks of gestation

Structure:
• secretory portion cells rest partly on myoepithelial cells

Secretions:
• little known – physiological role has not yet been demonstrated.
• high in protein, low in lipids
• stimulated by local or systemic adrenergic agents
• not continuous (eccrine secretion is)

Eccrine gland:
Regulate temperature  function is vital to normal activities. More abundant on palms, soles and forehead

Structure:
• Several parts – secretory segment, coiled duct, straight duct, intraepidermal coil, eccrine pore

Secretions:
• formed in two steps – isotonic fluid released by secretory coil and then resorption of sodium chloride in duct
• release mediated by acetylcholine

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