Endocrine and exocrine Endocrine Endocrine cells Hormone Blood fI。w Endocrine gland Ductless (b) Duct well vascularised Sweat gland長 Exocrine secrete hormones into extracellular fluid or bloodEndocrine and Exocrine Hormone Endocrine cells Duct Sweat gland Endocrine Exocrine -- Ductless -- well vascularised -- secrete hormones into extracellular fluid or blood Endocrine gland