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.
The loop of Henle salts will be excreted in the urine, making a concentration gradient in the medulla. The Henleâs loop is absorbant to particular ions with the cortical thick draining into the distal convoluted tubule.he urine then passes through the collecting ducts through the drainage system of the kidney to the ureters and bladder for urination. T he counter current system is similar to the nephron because the loop of henle is to be able to create dilute urine or concentrated urine depending on what the body wants and needs.