How walk the urinary mechanism work?

The body takes nutrients from food and also changes them to energy. After the body has actually taken the food contents that the needs, waste products are left behind in the bowel and in the blood.

The kidney and urinary systems help the body to get rid of liquid waste referred to as urea. Lock also aid to keep chemicals (such together potassium and also sodium) and water in balance. Urea is developed when foodstuffs containing protein (such together meat, poultry, and details vegetables) are damaged down in the body. Urea is carried in the blood come the kidneys. This is where it is removed, along with water and also other wastes in the form of urine.

The kidneys have actually other important functions. They control blood pressure and produce the hormone erythropoietin. This hormone controls red blood cell manufacturing in the bone marrow. The kidneys also control the acid-base balance and conserve fluids.


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Kidney and urinary system parts and also their functions

Two kidneys. This pair of purplish-brown organs is located listed below the ribs towards the center of the back. Their duty is to:

Remove rubbish products and medicines from the human body

Balance the body"s fluids

Balance a selection of electrolytes

Release hormone to manage blood press

Release a hormone to manage red blood cell production

Help with bone health by regulating calcium and also phosphorus

The kidneys remove urea native the blood with tiny filtering units referred to as nephrons. Each nephron is composed of a ball created of little blood capillaries (glomerulus) and also a small tube referred to as a renal tubule. Urea, along with water and also other waste substances, creates the urine as it passes v the nephrons and down the renal tubules that the kidney.

Two ureters.

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 These small tubes carry urine from the kidneys to the bladder. Muscle in the ureter walls store tightening and also relaxing. This forces urine downward, far from the kidneys. If to pee backs up, or is allowed to was standing still, a kidney infection have the right to develop. About every 10 come 15 seconds, little amounts of to pee are cleared into the bladder from the ureters.

Bladder. This triangle-shaped, hollow body organ is located in the lower belly. That is organized in location by ligaments that space attached to various other organs and the pelvic bones. The bladder"s wall surfaces relax and expand to store urine. Castle contract and flatten to empty urine v the urethra. The common healthy adult bladder have the right to store as much as 2 cups of urine because that 2 to 5 hours.

Two sphincter muscles. These circular muscles help keep urine indigenous leaking by closing tightly prefer a rubber band approximately the opening of the bladder.

Nerves in the bladder. The nerves alarm a human when that is time to urinate, or north the bladder.

Urethra. This tube allows urine to pass external the body. The brain signals the bladder muscle to tighten. This squeezes urine out of the bladder. In ~ the exact same time, the mind signals the sphincter muscle to relax to let urine exit the bladder through the urethra.

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As soon as all the signals happen in the exactly order, normal urination happens.