Final answer:
The primary function of the excretory system is to purify the body by eliminating waste matter. It removes metabolic waste products and helps maintain homeostasis in the body.
Step-by-step explanation:
The primary function of the excretory system is purifying the body by elimination of waste matter. The excretory system is responsible for removing metabolic waste products, such as urea and excess salts, from the body. It consists of several organs, including the kidneys, lungs, skin, and liver, which work together to filter and eliminate waste.
For example, the kidneys filter out waste products from the blood and form urine, which is then excreted from the body. The lungs eliminate carbon dioxide, a waste product of respiration, when we exhale. The skin releases sweat, which helps remove toxins from the body. And the liver detoxifies harmful substances and converts them into a form that can be eliminated by the body.
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