The pituitary gland is called the "master gland” of the endocrine system , because it controls the functions of the other endocrine glands
The pituitary gland is about the size of a pea and is located at the base of the brain
It is called as master gland because its secretion regulates and controls the secretion of the other endocrine glands such as thyroid gland, adrenal gland , pancreas etc. The hormones of this gland are also required for the different activities in the body.