Also called statute mile. a unit of distance on land in English-speaking countries equal to 5280 feet, or 1760 yards (1.609 kilometers).
Urine formation begins in the renal corpuscle, where blood passing through the glomerulus is filtered. Filtrates include water, ions, and other solutes, which are filtered out of the blood and into the capsular space to begin urine formation. Urine passes into the proximal convoluted tubule, then into the nephron loop.The nephron concentrates urine by the process of the countercurrent multiplication system.iltrates include water, ions, and other solutes, which are filtered out of the blood and into the capsular space to begin urine formation. Urine passes into the proximal convoluted tubule, then into the nephron loop. The nephron concentrates urine by the process of the countercurrent multiplication system.
In men, the urethra is longer and is encircled by the prostate, which is a gland that is part of the reproductive system. Urination occurs when the urinary sphincter muscle relaxes and the bladder muscle contracts to expel the urine. The bladder consists of three layers. The inner lining layer of the bladder, called the mucosa, is formed by a type of cell called transitional cell. The next layer, the lamina propria, provides support to the mucosa. The third layer is the bladder muscle itself.