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Anatomy of the Endocrine System

The following are integral parts of the endocrine system:

Anatomy of  the endocrine system in males and females
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  • Hypothalamus. The hypothalamus is located in the brain, near the optic chiasm. It secretes hormones that stimulate or suppress the release of hormones in the pituitary gland, in addition to controlling water balance, sleep, temperature, appetite, and blood pressure.

  • Pineal body. The pineal body is located below the corpus callosum, a part of the brain. It produces the hormone melatonin.

  • Pituitary. The pituitary gland is located at the base of the brain. No larger than a pea, the gland controls many functions of the other endocrine glands.

  • Thyroid and parathyroids. The thyroid gland and parathyroid glands are located in front of the neck, below the larynx (voice box). The thyroid plays an important role in the body's metabolism. Both the thyroid and parathyroid glands also play a role in the regulation of the body's calcium balance.

  • Thymus. The thymus is located in the upper part of the chest and produces T-lymphocytes (white blood cells that fight infections and destroy abnormal cells).

  • Adrenal gland. The pair of adrenal glands are located on top of both kidneys. Adrenal glands work hand-in-hand with the hypothalamus and pituitary gland.

  • Pancreas. The pancreas is located across the back of the abdomen, behind the stomach. The pancreas plays a role in digestion, as well as hormone production. Hormones produced by the pancreas include insulin, which regulates levels of sugar in the blood.

  • Ovary. A woman's ovaries are located on both sides of the uterus, below the opening of the fallopian tubes (tubes that extend from the uterus to the ovaries). In addition to containing the egg cells necessary for reproduction, the ovaries also produce estrogen and progesterone.

  • Testis. A man's testes are located in a pouch that hangs suspended outside the male body. The testes produce testosterone and sperm.

Online Resources

Hormone Foundation  http://www.hormone.org/endo101/

© 2000-2011 Krames StayWell, 780 Township Line Road, Yardley, PA 19067. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.