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TheUnknownScientist

Explanation:

TYPES OF GLANDS;

Gland :-

  • It is an organ or tissue that secretes specific chemical substance for performing a particular function.

There are three types of glands

  1. Endocrine glands
  2. Exocrine glands
  3. Heterocrine glands (Mixed glands)

Classification;

  • On the basis of presence or absence of ducts, glands are classified into endocrine glands and exocrine glands.

Exocrine gland;

  • It is a gland that pours its secretion on the surface or into a particular region.
  • By means of ducts for performing a metabolic activity.
  • Example, sebaceous glands, sweat glands, salivary glands, intestinal glands.

Endocrine gland;

  • It is an isolated gland (separates even from epithelium forming it).
  • Which secretes hormones that are poured into venous blood or lymph for reaching the target organ.
  • Because the gland is not connected with the target organ by any duct.
  • Example, hypothalamus, pituitary, thyroid, parathyroids, etc.

Heterocrine gland (Mixed gland);

  • It is a gland that has both exocrine and endocrine regions.
  • The former pouring their secretion through ducts,
  • While the latter pouring their secretion directly into blood/lymph,
  • Examples, pancreas, testes, ovaries, etc.

-TheUnknownScientist 72

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