1. BIO
... being scattered throughout the body like the Malpighian tubules of insects, the excretory tubules of humans, called nephrons, are collected into compact organs, the kidnets The kidneys are the major organs in humans responsible for processing the waste products of metabolism The kidneys, the blood vessels that serve them, and the plumbing that carries fluid formed in the kidneys out of the body compose with urinary system The waste fluid, urine, leaves the kidneys through a duct called the ureter The ureter drains in to a "holding tank ... Cells of the tubule walls reabsorb substances n...
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