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Visual Worksheet: Excretion in Humans

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FAQs on Visual Worksheet: Excretion in Humans

1. What is excretion in humans?
Ans. Excretion in humans is the biological process of removing waste products from the body. It helps maintain homeostasis by regulating the chemical composition of body fluids and eliminating substances that are no longer needed or that could be harmful.
2. Which organs are involved in the excretion process in humans?
Ans. The primary organs involved in excretion are the kidneys, which filter blood to produce urine. Other organs include the skin, which excretes sweat, and the lungs, which remove carbon dioxide from the body during respiration.
3. How do the kidneys function in the excretion process?
Ans. The kidneys function by filtering blood through nephrons, the basic functional units. They remove waste products, excess salts, and water, forming urine. This urine is then transported to the bladder for storage before being excreted from the body.
4. What role does the skin play in excretion?
Ans. The skin plays a role in excretion by producing sweat, which contains water, salts, and small amounts of urea. Sweating helps regulate body temperature and also assists in the removal of certain waste products from the body.
5. Why is excretion important for human health?
Ans. Excretion is crucial for human health as it helps eliminate toxic substances and metabolic waste from the body. This process prevents the accumulation of harmful materials that could disrupt normal bodily functions and contribute to diseases.
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