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Excretory System

ICSE · Class 10 · Biology

Quick revision notes for Excretory System — ICSE Class 10 Biology. Key concepts, formulas, and definitions for last-minute revision.

43 questions20 flashcards5 concepts

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A labeled diagram of the human excretory system, showing the kidneys, ureters, urinary bladder, and urethra, along with major associated blood vessels (aorta, vena cava).
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Key Topics to Revise

1

Introduction to Excretion

  • Excretion is the removal of metabolic wastes from cells or body of an organism
  • Main waste products include CO₂, urea, uric acid, creatinine, and bile pigments
  • Excretory organs include kidneys (chief), skin, lungs, liver, and intestine
2

Human Excretory System Structure

  • Components: 2 kidneys, 2 ureters, 1 urinary bladder, 1 urethra
  • Kidneys are bean-shaped, reddish organs located below diaphragm
  • Right kidney is slightly lower than left kidney
3

Kidney Structure

  • Enclosed in tough fibrous capsule
  • Two regions: outer cortex (dark) and inner medulla (light)
  • Cortex contains Malpighian capsules, PCT, and DCT
4

Nephron - Structure and Function

  • Nephron is the structural and functional unit of kidney
  • Each kidney has about 1.2 million nephrons
  • Two parts: Malpighian capsule and renal tubule

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Full Notes

Key Concepts

Excretion is the biological processThe human excretory system consistsEach kidney has two main regionsEach kidney contains about 1The first step of urine formation

Frequently Asked Questions

What are the important topics in Excretory System for ICSE Class 10 Biology?
Excretory System covers several key topics that are frequently asked in ICSE 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 Excretory System — ICSE Class 10 Biology?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision 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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