Like the nervous system, the endocrine system sends messages around the body. But unlike the quick response of the nervous system, the endocrine system uses hormones resulting in a much slower reaction time. The pituitary gland is the boss which controls most of the other glands by sending hormone messengers. However, there is one higher level boss. It is the hypothalamus portion of the brain which controls the pituitary gland. The Way We Work by David Macaulay has several pages which include drawings to help us better understand the endocrine system.
Pituitary Gland - Boss gland located in the brain near the hypothalamus
Pineal Gland - Internal body clock gland located in the brain and self regulated
Thyroid Gland - Located in the neck and controls metabolism, it receives direction from the Pituitary Gland.
Thymus Gland - Located in the chest and works to activate the immune system during childhood.
Adrenal Glands - Located in the kidneys they control reactions to stress
Pancreas - Controls sugar levels in the body
Mammary Gland, Ovary and Testis - Control reproduction
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