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Excretion in Humans — Syllabus

ICSE · Class 7 · Biology

What Excretion in Humans covers in ICSE Class 7 Biology: 4 topics, for the 2026-27 session. Part of the ICSE Class 7 Biology syllabus.

45 questions36 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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4 Topics · ICSE Class 7 Biology · 2026-27

Topics in Excretion in Humans

1

1. Excretion and Excretory Organs

  • Excretion means removal of toxic and unwanted metabolic waste products from the body.
  • Wastes to be removed include urea, uric acid, bile pigments, extra water, extra salts, and extra vitamins.
  • Urea and uric acid are nitrogenous wastes produced from the breakdown of excessive amino acids in the liver.
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2. Human Excretory System

  • The renal excretory system consists of a pair of kidneys, two ureters, a urinary bladder, and a urethra.
  • The kidneys are reddish-brown, bean-shaped organs situated towards the back of the abdomen.
  • Each kidney lies on either side of the backbone at the level of the last two ribs.
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3. Structure of the Kidney and Nephrons

  • The outer darker region of the kidney is called cortex.
  • The inner lighter region of the kidney is called medulla.
  • The medulla drains urine into a funnel-shaped structure called the renal pelvis.
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4. Urine Formation and Osmoregulation

  • Blood enters the kidney through the renal artery.
  • The nephrons filter the blood, remove waste substances, and produce urine.
  • Waste substances removed include excess water, mineral salts, and urea.

Key Concepts

Central concept: Excretion in Humans

ExcretionSubstances to be excretedRenal excretory systemKidneysNephronUrine formationAccessory excretory organsCommon disorders

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Frequently Asked Questions

What are the important topics in Excretion in Humans for ICSE Class 7 Biology?
Key topics in Excretion in Humans include Excretion and Excretory Organs, Human Excretory System, Structure of the Kidney and Nephrons, Urine Formation and Osmoregulation. Study these first, then practise questions on each for Class 7 exams.
How should I revise Excretion in Humans for Class 7 exams?
Learn the core ideas first, then work through the 45 practice questions on Excretion in Humans. Revise 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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