The central nervous system controls the hypothalamus in the brain?
The hypothalamus controls the pituitary gland, The pituitary gland secretes human growth hormone. Most growth hormone is secreted during the early hours of deepest sleep. Growth hormone is secreted into the blood stream where is can travel to, and influence any part of the body. As we get older the amount of GH declines. At age 21 we have 10 ml per deciliter of HGH in our blood. At age 61 it is 2 ml per deciliter.
