Endocrine glands are also called
a)	Exocrine glands	b)	Holocrine glands
c)	Heterocrine glands	d)	Enzyme secreting glands

(c)

Types of glands on the basis of presence or absence of ducts

(i) Exocrine Gland Those which drain out their secretion through duct  live, gastric glands, etc.

(ii) Endocrine Gland Those gland which lack duct and discharge their secretion (hormones) directly into the blood stream. Due to absence of duct they are also called, ductless gland or holocrine glands, ., thyroid, parathyroid, pituitary gland

(iii) Heterocrine Gland Those gland which have dual function due to possession of both exocrine as well as endocrine region. They secrete hormone in association with other substances for their respective function  ovary, testes, pancreas