Endocrine System
The endocrine system is a control system of ductless glands that secrete chemical "instant messengers" called hormones that circulate within the body via the bloodstream to affect distant cells within specific organs. Endocrine glands secrete their products immediately into the blood or interstitial fluid, without storage of the chemical. Hormones act as "messengers," and are carried by the bloodstream to different cells in the body, which interpret these messages and act on them. Typical endocrine glands are pituitary, thyroid, and adrenal glands, but not exocrine glands such as salivary glands, sweat glands and glands within the gastrointestinal tract.
The field of medicine that deals with disorders of endocrine glands is endocrinology, a branch of the wider field of internal medicine.
1. The hypothalamus and pituitary gland
The pituitary gland is called the “master gland” but it is under the control of the hypothalamus. Together, they control many other endocrine......
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