Step-by-step 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
- Endocrine glands
- Exocrine glands
- 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