So basically, this set of capillaries brings the oxygenated blood, the nutrients to the cells found in this section and then it empties out that deoxygenated blood to this entire vein system that basically connects and eventually enters and becomes the renal vein. So the renal vein receives the deoxygenated blood from the kidney, specifically from the vasa rectan of our nephron of each one of these nephrons found inside the kidneys. So it returns that deoxy in the blood back to the systemic blood circulation system and will define what systemic blood circulation system is when we'll discuss the cardiovascular system and the heart. So basically, this is the basic structure of our kidney. The kidney consists of these basic units known as nephrons that are found throughout the cortex and throughout our medulla. Now, in the next lecture, we're going to focus on the structure and the function of the nephron in much more detail and we'll see what the function of each one of these sections of the nephron is.