The urinary system The kidneys, ureters, urinary bladder and the ureters form the normal urinary system. The kidneys filter the blood in order to remove the wastes and excess fluids from the body and form the urine. This travels to the urinary bladder via the ureters. The urinary bladder stores the urine until it is passed out of the body via the urethra. Within the kidneys are nearly a million small filtering units called glomeruli. Blood flows through tiny tubes and intricate networks of blood vessels within the kidneys to the glomeruli in order to undergo the filtration process. The wastes and excess water from blood passes through the walls of the tubes to form urine. Blood cells and other components such as protein cannot pass through the walls because of their bigger size. The urine thus formed passes through the network of tubules and tubes to collect into the renal calyx that sends it along to the ureters. Within these tubules several important components are reabsorbed. These include fluids, salts and minerals that are taken back into the body and not excreted.
Posted on: Thu, 22 Aug 2013 10:20:28 +0000
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