Apocrine,Holocrine and Eccrine glands

Apocrine glands

  • Apical parts of the glands shed off following secretion
  • eg:Atypical Sweat glands,ceruminous glands,Glands of Moll,mammary glands.

Holocrine glands

  • WHOLE part of the gland is destroyed following secretion
  • eg:Sebaceous glands

Eccrine glands/Merocrine/Epicrine

  • Glands remain intact(exocrine glands).
  • Majority of sweat glands are Eccrine glands.

Sweat Glands

Sweat glands are of two types.

Eccrine/merocrine—–>Typical sweat glands.

  • Distributed all over the body.
  • Innervated by cholinergic system.
  • Secretory portion has clear cell,dark cells,myoepithelial cells.

Apocrine—–>Atypical sweat glands.

  • Axilla,monspubis,circumanal area,areola and nipple.
  • Excretory ducts open into hair follicles.
  • Functional after puberty
  • Supplied by adrenergic nerves.

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