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The Epic Interactive Encyclopedia 1998
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Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
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Adrenal_gland
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1992-09-02
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adrenal gland, or suprarenal gland
A gland situated on top of the kidney. The
adrenals are soft and yellow, and consist of
two parts: the cortex and medulla. The cortex
(outer part) secretes various steroid
hormones, controls salt and water metabolism,
and regulates the use of carbohydrates,
proteins, and fats. The medulla (inner part)
secretes the hormones adrenaline and
noradrenaline which constrict the blood
vessels of the belly and skin so that more
blood is available for the heart, lungs, and
voluntary muscles, an emergency preparation
for the stress reaction `fight or flight'.
Subject by: Russell Webb