1 Strenuous exercise, such as running a marathon, can also cause blood in the urine. 2  White blood cells may be a sign of infection or kidney disease. 3  Casts. 4  Some types of kidney disease can cause plugs of material (called casts) to form in tiny tubes in the kidneys.
A loop of Henle can be found in one of the hundreds of thousands of nephrons contained within the kidneys. The loop of Henle dips down from the nephron into the medulla and then back into the cortex. The loop of Henle is part of a nephron, a tiny tube inside the kidneys that filters solutes. The loop of Henle allows the kidneys to maintain the correct balance of water in the body.
F: Cortex. The cortex is the outer part of the kidney. This is where blood is filtered. We call this process âultra-filtrationâ or âhigh pressure filtrationâ because it only works if the blood entering the kidney in the renal artery is at high pressure.ere is a diagram of the kidney showing a nephron broken up into six parts. Each part has a specific function. You can click on a letter to find out what that part does. Here is a diagram of a nephron put back together again. You can click on a green or red area to find out what happens there.