Tiny organ located at the base of the brain and responsible for managing circadian rhythm.
A portion of the brain that contains a number of small nuclei with a variety of functions, it connects the nervous system to the endocrine system.
Gland in the base of the skull that secretes nine hormones that directly regulate many body functions and control the actions of several other endocrine glands.
Small organ located on top of the kidneys that releases adrenaline and cortisol during states of emotional arousal.
Organ lying between the stomach and small intestine; regulates blood sugar by secreting two regulating hormones: insulin and glucagon.
Gland that produces hormones important to the immune response.
Regulates the body's metabolism and calcium balance.
Produces a hormone to mobilize calcium from the bones to the blood.
Located on both sides of the uterus in the female pelvis, secreting estrogen and progesterone.
The male gonads, which produce sperm and secrete male sex hormones.