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Why do we need kidneys?
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The kidneys remove waste products from our blood. Inside each of the two kidneys there are about a million clumps of tiny blood vessels called capillaries. There are tiny tubes around the clumps, and as blood flows through the capillaries, waste substances pass into the tubes. The waste products travel from the kidneys to the bladder, where they are stored in urine until we pass it out of the body. | | Our two kidneys, each about 10 cm. long, lie on either side of the spine below the diaphragm. |
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Previous:
Back
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Book:
1001
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Section:
Human World
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Chapter:
Human Body: Organs
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