The mesonial cells are modified smooth muscle cells that are responsible for contracting our blood vessels inside our glomerulus. And that speeds up or slows down the movement of the blood plasma through our glomerulus. So this is our glomerulus. Now what about the Bowman's capsule? The Bowman's capsule consists of a parietal layer of cells which is this outer layer of cells found on both sides as well as an inner layer of cells that is known as the visceral layer. And the visceral layer contains a specialized type of filtration cell known aside the potato side, as we'll see in just a moment, contains very small slits that actually allow the filtration of our blood.