How Kidneys Produce Urine Part 1

Human kidneys have three layers called the cortex the medulla and the pelvis. The blood flows through the renal artery. The renal artery branches into smaller arteries in the medulla and the cortex. Then the arteries end in a blood filtration, also known as a nephron. A set of kidneys has close to 2 000 000 nephrons. Those 2 000 000 nephrons filter 1 900 L of blood everyday.