SR ROBOTICS The Excretory System School project Working model LED...

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The excretory system is one of the most important systems in the human body. Its main job is to remove waste products and excess substances from the body to keep it clean and healthy. The system helps maintain the balance of water, salts, and other chemicals inside the body — a process called homeostasis. The main organs of the excretory system are the kidneys, ureters, urinary bladder, and urethra. The kidneys filter the blood and remove waste materials in the form of urine. The ureters carry urine from the kidneys to the bladder, where it is stored. Finally, the urethra helps the body get rid of urine. The skin, lungs, and liver also help in excretion by removing sweat, carbon dioxide, and other wastes.