Our immaculate densa as well as our agranial cells or our laces cells. Now, the granule cells are involved in secreting a type of proteolytic enzyme known as Renan. And Renin is involved in the Rena angiotensin aldestroone pathway that is involved in controlling the blood volume and blood pressure inside our body. Now, the macula density cells are found on our proximal convolutubial and they're found in close proximity to the granule cells. And these macular density cells are basically important because they are able to actually sense the concentration of sodium chloride inside the distal convoluted tubule. And they are also responsible for stimulating the granular cells to release that green and proteolytic enzyme that is responsible for controlling our blood volume and blood pressure.