Hypothalamus and hypothesis are internal secretion glands that perform different functions. The physiology of these glands describes their functions and their distinct physiological functions. Physiology discusses how physiological functions are regulated and how these functions interconnect with each other so as to be able to perform in a single body as a unitary system. Hypothalamus controls all the hormone system of the body. Hypothesis, too, secrets several hormones that affect the performance of other internal glands and influence the whole system of hormones effectively. Hypothesis itself is regulated by the nervous system. Correct functioning of these two glands regulates functions influenced by hormones secreted by these glands.