Define the following :
(a) Exocrine glands (b) Endocrine glands

Explanation

(a) Exocrine glands are glands releasing their secretion in ducts which carry them on the body surface (e.g., sweat glands) or to some specific body part (e.g., liver).
(b) Endocrine glands are ductless glands and secrete their secretions, called hormones, generally in the blood and have specific effect on a specific target organ of the body.