Epiphysis [ih-pif-uh-sis]  

pineal gland
or pineal body

Endocrine gland in the brain that produces melatonin. It is large in children and begins to shrink at puberty. The gland may play a significant role in sexual maturation, circadian rhythm and sleep induction, and seasonal affective disorder and depression. In animals it is known to play a major role in sexual development, hibernation, and seasonal breeding.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Epiphysis

Epiphysis is the name for a rounded end of a long bone. The epiphysis is filled with red bone marrow, which produces erythrocytes, or red blood cells. The epiphysial plate, also known as the growth plate, is located where the epiphysis meets the metaphysis.

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Last updated on Wednesday August 13, 2008 at 22:30:30 PDT (GMT -0700)
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