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adrenal medulla

(uh-DREE-nul meh-DOO-luh)
The inner part of the adrenal gland (a small organ on top of each kidney). The adrenal medulla makes chemicals such as epinephrine (adrenaline) and norepinephrine (noradrenaline) which are involved in sending nerve signals.
Anatomy of the adrenal gland; drawing of the abdomen showing the left and right adrenal glands, the left and right kidneys, and major blood vessels. Also shown is an inset of an adrenal gland showing the adrenal cortex and the adrenal medulla.Enlarge this image in new window
Anatomy of the adrenal gland. There are two adrenal glands, one on top of each kidney. The outer part of each gland is the adrenal cortex and the inner part is the adrenal medulla.
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