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.
Page 15 of 19. Henle's loop consists of a thin descending limb, a thin ascending limb characterized by a thin flat squamus epithelial cell, and a thick ascending limb with somewhat taller squamous epithelial cells.t the junction of the outer and inner medulla the epithelial cells of the ascending limb become cuboidal, the tubule diameter increases and the segment becomes the thick ascending limb of Henle's loop. At this point it is necessary to distinguish between three types of nephrons.