What is Gland?
{{otheruses}} [[File:Tepegua-2-glands.jpg|thumb|right|The leaves of this plant have glands that produce a [[fragrant]] [[oil|oily]] substance.]] A '''gland''' is a group of [[cell]]s in the body which make substances such as [[hormones]]. They are in [[human]]s and other animals, and in [[plant]]s. *If the substance is put directly into the [[blood]]stream, the gland is called '''[[endocrine gland]]'''. *If the substance is carried by a [[duct]], the gland is called an '''[[exocrine gland]]'''. Exocrine ducts empty outside the body, or into [[cavity|cavities]] inside the body. Examples of glands in humans are: *[[Sweat gland]]s that produce [[sweat]] for perspiration. *The [[pineal gland]] in the [[brain]], which produces the hormone [[melatonin]] at night. {{biology-stub}} [[Category:Glands| ]]