The anterior pituitary receives signalling molecules from the hypothalamus, and in response, synthesizes and secretes seven hormones.
The posterior pituitary does not produce any hormones of its own; instead, it stores and secretes two hormones made in the hypothalamus.
The Endocrine System is made up of the pituitary gland, thyroid gland, parathyroid glands, adrenal glands, pancreas, ovaries (in females) and testicles (in males), according to the Mayo Clinic.