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Excretion

Telangana Board · Class 10 · Biology

Quick revision notes for Excretion — Telangana Board Class 10 Biology. Key concepts, formulas, and definitions for last-minute revision.

45 questions40 flashcards5 concepts

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Key Topics to Revise

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1. Meaning and Importance of Excretion

  • Excretion involves removal of nitrogenous compounds like ammonia, urea, uric acid, bile pigments, excess salts, and water.
  • Ammonia is the most poisonous waste product of metabolism.
  • Metabolic activities produce useful materials as well as harmful wastes.
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2. Human Excretory System

  • The human excretory system consists of a pair of kidneys, a pair of ureters, urinary bladder, and urethra.
  • Kidneys are a pair of bean-shaped, reddish brown organs present in the abdominal cavity attached to the dorsal body wall.
  • The right kidney is lower than the left kidney because the liver occupies the right side of the abdominal cavity.
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3. Structure of Nephron

  • A nephron has two main parts: Malpighian body and renal tubule.
  • Malpighian body consists of Bowman's capsule and glomerulus.
  • Glomerulus is a network of fine blood capillaries inside Bowman's capsule.
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4. Urine Formation

  • Urine formation involves four stages: glomerular filtration, tubular reabsorption, tubular secretion, and formation of concentrated urine.
  • During glomerular filtration, blood enters the glomerulus from the renal artery through the afferent arteriole and is filtered under high pressure.
  • The filtrate formed at this stage is called primary urine.

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Full Notes

Key Concepts

Excretion is the removal of nitrogenousThe human excretory system consistsKidneys are a pair of beanA nephron is the structuralThe Malpighian body consists of Bowman’s

Frequently Asked Questions

What are the important topics in Excretion for Telangana Board Class 10 Biology?
Excretion covers several key topics that are frequently asked in Telangana Board Class 10 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Excretion — Telangana Board Class 10 Biology?
Understand the core concepts first, then work through the 45 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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