• Skip to main content
  • Skip to secondary menu
  • Skip to primary sidebar
  • Skip to footer

CBSE Tuts

CBSE Maths notes, CBSE physics notes, CBSE chemistry notes

  • NCERT Solutions
    • NCERT Solutions for Class 12 English Flamingo and Vistas
    • NCERT Solutions for Class 11 English
    • NCERT Solutions for Class 11 Hindi
    • NCERT Solutions for Class 12 Hindi
    • NCERT Books Free Download
  • TS Grewal
    • TS Grewal Class 12 Accountancy Solutions
    • TS Grewal Class 11 Accountancy Solutions
  • CBSE Sample Papers
  • NCERT Exemplar Problems
  • English Grammar
    • Wordfeud Cheat
  • MCQ Questions

NEET Biology Notes Excretory Products And their elimination Modes of Excretion

 NEET Biology Notes Excretory Products And their elimination Modes of Excretion

Modes of Excretion

The process of removal of nitrogenous wastes from the body is called excretion. The organs of excretion are called excretory organs. There are different types of excretory products or waste materials in different animals.

There are three modes of excretion

  •  Ammonotelism

Ammonotelic excretion is found in aquatic animals like protozoans (e.g. Amoeba and Paramecium), sponges (e.g. Sycon), coelenterates (e.g. Hydra), aquatic arthropods (e.g. prawn), most aquatic molluscs (e.g. Pila), bony fishes (e.g. Labeo) and frog’s tadpole. Ammonia as a waste product is most toxic because of high pH and high solubility in water, so large amount of water is required for its excretion. It is lost through general body surface into surrounding water.

  • Ureotelism

The main nitrogenous waste is urea. Ureotelic excretion is found in those animals, which can take in water and can retain considerable amounts of urea in their blood. It is a common method of excretion in human, whales, seals, camels, kangaroo, toads, frogs, sharks, etc. Urea formation in liver cells of mammals was studied by Krebs and Henseleit. Urea is formed in liver by detoxification of ammonia through ornithine cycle. Urea is transported in the blood by plasma.
A person, who takes large amount of protein in his diet will excrete more urea. A person having no food, water will have more urea in his blood. Less water is required for excretion of urea.

  •  Uricotelism

The rpain nitrogenous waste is crystals of uric acid. It is common in birds, land reptiles (snakes and lizards), insects, snails, etc. Uric acid is least soluble in water and is less toxic. Excreted in solid crystal forms. Formed from ammonia in the liver of uriotelic animals and Malpighian tubules in insects.

 

NEET Biology Notes Excretory Products And their elimination Modes of Excretion 1

BiologyPhysicsChemistry

Primary Sidebar

NCERT Exemplar problems With Solutions CBSE Previous Year Questions with Solutoins CBSE Sample Papers
  • The Summer Of The Beautiful White Horse Answers
  • Job Application Letter class 12 Samples
  • Science Lab Manual Class 9
  • Letter to The Editor Class 12 Samples
  • Unseen Passage For Class 6 Answers
  • NCERT Solutions for Class 12 Hindi Core
  • Invitation and Replies Class 12 Examples
  • Advertisement Writing Class 11 Examples
  • Lab Manual Class 10 Science

Recent Posts

  • Understanding Diversity Question Answer Class 6 Social Science Civics Chapter 1 NCERT Solutions
  • Our Changing Earth Question Answer Class 7 Social Science Geography Chapter 3 NCERT Solutions
  • Inside Our Earth Question Answer Class 7 Social Science Geography Chapter 2 NCERT Solutions
  • Rulers and Buildings Question Answer Class 7 Social Science History Chapter 5 NCERT Solutions
  • On Equality Question Answer Class 7 Social Science Civics Chapter 1 NCERT Solutions
  • Role of the Government in Health Question Answer Class 7 Social Science Civics Chapter 2 NCERT Solutions
  • Vital Villages, Thriving Towns Question Answer Class 6 Social Science History Chapter 9 NCERT Solutions
  • New Empires and Kingdoms Question Answer Class 6 Social Science History Chapter 11 NCERT Solutions
  • The Delhi Sultans Question Answer Class 7 Social Science History Chapter 3 NCERT Solutions
  • The Mughal Empire Question Answer Class 7 Social Science History Chapter 4 NCERT Solutions
  • India: Climate Vegetation and Wildlife Question Answer Class 6 Social Science Geography Chapter 8 NCERT Solutions
  • Traders, Kings and Pilgrims Question Answer Class 6 Social Science History Chapter 10 NCERT Solutions
  • Environment Question Answer Class 7 Social Science Geography Chapter 1 NCERT Solutions
  • Understanding Advertising Question Answer Class 7 Social Science Civics Chapter 7 NCERT Solutions
  • The Making of Regional Cultures Question Answer Class 7 Social Science History Chapter 9 NCERT Solutions

Footer

Maths NCERT Solutions

NCERT Solutions for Class 12 Maths
NCERT Solutions for Class 11 Maths
NCERT Solutions for Class 10 Maths
NCERT Solutions for Class 9 Maths
NCERT Solutions for Class 8 Maths
NCERT Solutions for Class 7 Maths
NCERT Solutions for Class 6 Maths

SCIENCE NCERT SOLUTIONS

NCERT Solutions for Class 12 Physics
NCERT Solutions for Class 12 Chemistry
NCERT Solutions for Class 11 Physics
NCERT Solutions for Class 11 Chemistry
NCERT Solutions for Class 10 Science
NCERT Solutions for Class 9 Science
NCERT Solutions for Class 7 Science
MCQ Questions NCERT Solutions
CBSE Sample Papers
NCERT Exemplar Solutions LCM and GCF Calculator
TS Grewal Accountancy Class 12 Solutions
TS Grewal Accountancy Class 11 Solutions