Science
Excretion
उत्सर्जन
In this Class 10 Science topic from the chapter Life Processes, students learn how organisms remove harmful metabolic wastes and maintain internal balance. The lesson focuses on the human excretory system, including the roles of the kidneys, ureters, urinary bladder and urethra. Students also study the structure of a nephron and understand how filtration, selective reabsorption and urine formation take place. The topic explains excretion in plants and connects waste removal with the proper functioning of the body.
Practice questions
What is the meaning of excretion?EasyLevel 22What is the main organ of excretion in humans?EasyLevel 22What is the process of removing harmful waste substances from the body called?EasyLevel 23What is the meaning of excretion?EasyLevel 24By which process do plants remove extra water?EasyLevel 24How should excretion be understood as different from digestion?EasyLevel 22Why will life processes be affected if wastes keep accumulating in the body?MediumLevel 22Why is it wrong to understand excretion only as removal of faeces?MediumLevel 22How can dialysis be life-saving when the kidneys fail?MediumLevel 22Why is removal of wastes as necessary as obtaining energy in life processes?MediumLevel 22If the body has transport but no excretion what will be the most serious long-term problem?MediumLevel 22Why is it wrong to consider excretion and egestion the same?MediumLevel 23What is the main urine-forming unit in humans?EasyLevel 1