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Excretory Products and their Elimination

Jharkhand Board · Class 11 · Biology

Quick revision notes for Excretory Products and their Elimination — Jharkhand Board Class 11 Biology. Key concepts, formulas, and definitions for last-minute revision.

109 questions20 flashcards5 concepts

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Key Topics to Revise

1

Types of Nitrogenous Wastes and Excretory Patterns

  • Animals accumulate ammonia, urea, uric acid, CO2, water, and ions (Na+, K+, Cl-, phosphate, sulphate) that need elimination
  • Three major forms of nitrogenous wastes: Ammonia (most toxic), Urea (moderately toxic), Uric acid (least toxic)
  • Ammonotelism: Excretion of ammonia - bony fishes, aquatic amphibians, aquatic insects
2

Excretory Organs in Animals

  • Protonephridia/Flame cells: Platyhelminthes, rotifers, some annelids, Amphioxus - osmoregulation
  • Nephridia: Earthworms and annelids - remove nitrogenous wastes and maintain ionic balance
  • Malpighian tubules: Insects including cockroaches - excretion and osmoregulation
3

Human Excretory System - Structure

  • Components: Pair of kidneys, pair of ureters, urinary bladder, urethra
  • Kidney specifications: 10-12 cm length, 5-7 cm width, 2-3 cm thickness, 120-170g weight
  • Kidney location: Between last thoracic and third lumbar vertebra
4

Nephron Structure and Types

  • Glomerulus: Tuft of capillaries from afferent arteriole, blood exits via efferent arteriole
  • Bowman's capsule: Double-walled cup enclosing glomerulus
  • Malpighian body/Renal corpuscle: Glomerulus + Bowman's capsule

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Full Notes

Key Concepts

Animals excrete three main typesDifferent animals have evolved various excretoryHuman kidneys are beanUrine formation involves three main stepsThe arrangement of loop of Henle

Frequently Asked Questions

What are the important topics in Excretory Products and their Elimination for Jharkhand Board Class 11 Biology?
Excretory Products and their Elimination covers several key topics that are frequently asked in Jharkhand Board Class 11 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 Products and their Elimination — Jharkhand Board Class 11 Biology?
Understand the core concepts first, then work through the 109 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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