Endocrine SystemLike the nervous system, the endocrine(en-do-krin) systemcontrols body activities, but it acts much more slowly. The endocrine glands produce chemical molecules called hormonesand release them into the blood to travel to relatively distant target organs.The endocrine glands include the pituitary, thyroid, parathyroids, adrenals, thymus, pancreas, pineal, ovaries (in the female), and testes (in the male). The endocrine glands are not connected anatomically in the same way that parts of the other organ systems are. What they have in common is that they all secrete hormones, which regulate other structures. The body functions controlled by hormones are many and varied, involving every cell in the body. Growth, reproduction, and food use by cells are all controlled (at least in part) by hormones.Cardiovascular SystemThe primary organs of the cardiovascular system are the heart and blood vessels. Using blood
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