The Endocrine System

The endocrine system is a collection of specialized cells that are built to produce and release hormones - chemical messengers who travel around the body through blood and other fluids. Hormones cooperate and interact with the nervous system to control many of the body's functions.


Some of the body functions regulated by the endocrine system include:

controlled by the hypothalamus and pituitary:

adrenal glands and stress

the menstrual cycle and sperm and testosterone production



thyroid gland and homeostasis



the renin-angiotensin-aldosterone system and blood pressure

parathyroid glands and calcium

anti-diuretic hormone and fluid balance

pancreas, - regulator of blood sugar as well as cellular metabolism and digestion and absorption

liver - processor, storager, and isposer of nutrients and wastes

fat and adipokines - bad things



Some hormones are a part of feedback loops regulating homeostasis. Other hormones are active only at certain times, as occurs during human development, puberty, or the menstrual cycle.



Certain things make the endocrine system special: