Question

endocrine glands classification
which is a primary endocrine organ?
gonads
pancreas
liver
thyroid

Explanation:

Primary endocrine organs are those whose primary function is to produce and secrete hormones. The thyroid gland is a primary endocrine organ as its main role is to secrete thyroid hormones (like thyroxine) which regulate metabolism. Gonads (ovaries and testes) have a primary role in gamete production (reproductive function) along with hormone secretion. The pancreas has both exocrine (digestive enzyme secretion) and endocrine (insulin, glucagon secretion) functions. The liver has multiple functions like detoxification, metabolism of nutrients etc., and its endocrine - related functions (e.g., producing insulin - like growth factor) are not its primary role.

Answer:

Thyroid