So we have have kidneys, we have the heart, we have the skin, we have the pineal gland or the pineal body, we have the liver and we have our stomach. So let's begin by briefly discussing some of the hormones released by our kidneys. Now, the two hormones that we're going to discuss is Erythropoietin and also our calcitriol. Now, I also briefly discussed a proteolytic enzyme known as Renan. But Renan is not actually a hormone and that's exactly why I place the star next to number one. So a special type of cell, our kidney cell, known as the granular cell or the juxtaglomero cell, is responsible for synthesizing and secreting the proteolytic enzyme Rena.