What is the difference between excretion and egestion? Name three major organs of excretion in humans, the substances they excrete and the function of this excretion.

Excretion is the removal of toxic materials, waste products of metabolism and excess substances from organisms.

Egestion is the passing out of undigested food as faeces, through the anus.

Three major organs of excretion are the skin, kidneys and lungs.

Sweat glands in the skin produce sweat. This contains water, urea and salt. Excreting sweat helps keep the body cool in hot conditions.

The kidneys remove excess water, salts and urea to prevent a toxic build-up of these substances in the body.

The lungs remove excess carbon dioxide (and some water) when breathing out.

Answered by Lucy W. Biology tutor

97384 Views

See similar Biology GCSE tutors

Related Biology GCSE answers

All answers ▸

What Mechanisms control the human body's temperature ?


This question is about the nervous system. Describe the difference between the function of a receptor and the function of an effector. In your answer you should give one example of a receptor and one example of an effector.


What is the difference between diffusion, osmosis and active transport?


Describe how an impulse travels across a synapse


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2024

Terms & Conditions|Privacy Policy