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.
Top 10 facts about the world. The loop of Henle is a part of a nephron, a tiny tube inside the kidneys that filters solutes. Each kidney contains hundreds of thousands of individual nephrons, which pass between the cortex of the kidneys and the medulla, connecting to collecting ducts which route urine to the ureter so that it can be expressed.
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.