When you feel thirsty, your brain is telling you to get more fluids to keep your body as balanced as possible. If you don't have enough fluids in your body, the brain communicates with the kidneys by sending out a hormone that tells the kidneys to hold on to some fluids. When you drink more, this hormone level goes down, and the kidneys will let go of more fluids. You might notice that sometimes your pee is darker in color than other times. Remember, pee is made up of water plus the waste that is filtered out of the blood.
If you don't take in a lot of fluids or if you're exercising and sweating a lot, your pee has less water in it and it looks darker. If you're drinking lots of fluids, the extra fluid comes out in your pee, and it will be lighter. Kidneys are always busy. Besides filtering the blood and balancing fluids every second during the day, the kidneys constantly react to hormones that the brain sends them. Kidneys even make some of their own hormones.
For example, the kidneys produce a hormone that tells the body to make red blood cells. Now you know what the kidneys do and how important they are. Maybe next Valentine's Day, instead of the same old heart, you can give your parents a special card featuring the kidneys!
Reviewed by: Larissa Hirsch, MD. Larger text size Large text size Regular text size. What Are Kidneys? What Do Kidneys Do?
Page 1 The Path of Pee The waste that is collected combines with water which is also filtered out of the kidneys to make urine pee. Clinical trials that are currently open and are recruiting can be viewed at www. The NIDDK translates and disseminates research findings to increase knowledge and understanding about health and disease among patients, health professionals, and the public. How do my kidneys work? How does blood flow through my kidneys? Clinical Trials The kidneys are two bean-shaped organs, each about the size of a fist.
You have two kidneys that filter your blood, removing wastes and extra water to make urine. Why are the kidneys important? Without this balance, nerves, muscles, and other tissues in your body may not work normally.
Your kidneys also make hormones that help control your blood pressure make red blood cells keep your bones strong and healthy Watch a video about what the kidneys do. Each nephron has a glomerulus to filter your blood and a tubule that returns needed substances to your blood and pulls out additional wastes.
Wastes and extra water become urine. The glomerulus filters your blood As blood flows into each nephron, it enters a cluster of tiny blood vessels—the glomerulus. The tubule returns needed substances to your blood and removes wastes A blood vessel runs alongside the tubule. Blood flows into your kidneys through the renal artery and exits through the renal vein. Your ureter carries urine from the kidney to your bladder.
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