Another crucial body system is the excretory system. It is the system that collects wastes produced by cells and removes them from the body by excretion. If we didnt have it, wastes would beneficial pile up and make us sick. Materials that need to be eliminated from the body include excess water, carbon dioxide, and urea, a chemic that comes from the breakdown of proteins.
The kidneys ar the major organs of the excretory system and they get rid of urea and the extra water. The waste runny produced by the kidneys is called urine, and it contains both these substances. When urine is formed, both wastes and needed materials, like glucose, are removed from the blood. Most of the needed material is subsequently returned to the blood. Urine flows from the kidneys through the ureters, and down into the urinary bladder, where it is stored. The kidneys act as filters and contain about 1 million tiny nephrons. As urine forms, they maintain homeostasis by regulating the water take in our bodies. Besides the kidneys, other organs of excretion are the lungs, skin, and liver. When we...If you want to get a full essay, order it on our website: Orderessay
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