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Excretory Organs Video Lecture | Biology for JAMB

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1. What are the excretory organs in the human body?
Ans. The excretory organs in the human body are the kidneys, liver, lungs, skin, and intestines. These organs play a crucial role in eliminating waste products and maintaining the body's overall balance.
2. How do the kidneys function as excretory organs?
Ans. The kidneys filter waste materials, excess water, and other substances from the blood to form urine. They regulate the body's electrolyte balance, control blood pressure, and produce hormones that stimulate red blood cell production.
3. What is the role of the liver in the excretory system?
Ans. The liver acts as a vital excretory organ by filtering and detoxifying harmful substances, such as drugs and alcohol, from the blood. It also produces bile, which aids in the digestion and elimination of fats.
4. How do the lungs contribute to the excretory process?
Ans. The lungs eliminate carbon dioxide, a waste product of cellular respiration, from the body. During respiration, oxygen is inhaled, and carbon dioxide is exhaled through a process called gas exchange.
5. How does the skin participate in excretion?
Ans. The skin acts as an excretory organ through the process of sweating. Sweat contains waste products such as urea, salts, and water, which are eliminated through pores in the skin. Sweating helps regulate body temperature and remove certain toxins.
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