Name one gland each :
(a) which acts only as an endocrine gland.
(b) which acts only as an exocrine gland.
(c) which acts both as an endocrine gland as well as an exocrine gland.
(a) An endocrine gland is a ductless gland. For example, the thyroid is an endocrine gland.
(b) An exocrine gland is a gland that has a duct. Example: salivary gland.
(c) Pancreas acts both as an endocrine gland and an exocrine gland.