ANT 250 II How the Urinary System Work M4 Case

ANT 250 II How the Urinary System Work M4 Case - ANT250 II...

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ANT250 II –Pamela Roberson The Workings of the Urinary System The urinary system consists of the kidneys, ureters, urinary bladder, and urethra. The kidneys filter wastes from the blood. The waste known as urea, form when the body digests proteins from the food we eat. Urea moves through the blood until it reaches the kidneys. Once in the kidneys, the blood moves through nephrons and when the blood moves through the nephrons, the urea, excess water and other waste products separate and move out of the nephrons via the renal tubules(Nih.Gov, 2007) . The waste is now urine. The ureters carries the urine away from kidneys pushes the urine down to the urinary bladder, which is a temporary reservoir for the urine. The body feels an urge to urinate when nerves in the bladder send a signal to the brain that a trip to the bathroom is needed. When the brain signals the bladder muscles to contract, the sphincter muscles open by relaxing, allowing urine to flow down into the urethra and out of the body (www.ehow.com).
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ANT 250 II How the Urinary System Work M4 Case - ANT250 II...

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