what are nephrons??
explain in points
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Explanation:
- Nephron, functional unit of the kidney .
- The structure that actually produces urine in the process of removing waste and excess substances from the blood.
- There are about 1,000,000 nephrons in each human kidney.
- The most primitive nephrons are found in the kidneys (pronephros) of primitive fish, amphibian larvae, and embryos of more advanced vertebrates.
- The nephrons found in the kidneys (mesonephros) of amphibians and most fish, and in the late embryonic development of more advanced vertebrates, are only slightly more advanced in structure.
- The most advanced nephrons occur in the adult kidneys, or metanephros, of land vertebrates, such as reptiles, birds, and mammals.
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