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| Kidney Model 6 |
by GreenFlames09 on Flickr |
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- The urinary system is the main excretory system in the human body.
- The central organs are kidneys
- Kidneys work to filter waste, out of blood and produce urine.
- Blood enters the kidneys through the renal arteries into a medulla.
- All the blood vessels lead to a glomerulus, small looping and twisting tube with tiny holes inside it.
- Water and some other substances leak out of a glomeruli which are collected by nephrons and also filtering tubes.
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| Kidney Model 7 |
by GreenFlames09 on Flickr |
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- Substances that are used by the human body which includes amino acids, glucose and basically all the water are re-absorbed by blood cells.
- Substances that are waste including urea, uric acid, excess water and some salts like ammonia and sodium are gathered by small tubes called the collecting tubules.
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| Kidney Model 1 |
by GreenFlames09 on Flickr |
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- From tubules, the urine passes into the kidneys pelvis through the ureters which go into the urinary bladder.
- The urine goes out of the body through what is called a urethra when the bladder is full.
- Everyday kidneys filter about 50 gallons (190 liters) of blood to produce at least 1-2 quarts (0.9 - 1.9 ) of your urine.
- Kidneys make less urine when you perspire and more when you drink a lot of liquids.
- Besides urine production, your bones will get Vitamin D for bone development, and will also help maintain blood pressure.
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