ROGER HARRIS / SCIENCE PHOTO LIBRARY ROGER HARRIS / SCIENCE PHOTO LIBRARY
Hypothalamus in the brain. Computer artwork of a person's head showing the brain inside. The highlighted area shows the hypothalamus. The hypothalamus is a complex area with a number of important functions. One of the most important is to link the nervous system to the endocrine system via the pituitary gland. It responsible for certain metabolic processes and other activities of the autonomic nervous system. It synthesizes and secretes neurohormones, which in turn stimulate or inhibit the secretion of pituitary hormones. The hypothalamus also plays a role in controlling body temperature, hunger, thirst, fatigue, and circadian cycles.
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