So let's discuss each one of these hormones. Let's begin with the human growth hormone, also known as the growth hormone. So basically, the hormone that is released by the hypothalamus, that stimulates the release of the human growth hormone is known as the growth hormone releasing hormone or GHRH. So, GHRH is released by the hypothalamus. It travels down the portal veins into this capillary bed system that basically causes these endocrine cells to release our growth hormone. Now, the human growth hormone basically stimulates almost all the cells in our body.