Why is the human circulatory system a double system?

The human circulatory system consists of the heart - a pump and a series of tubes - the blood vessels containing the blood. There is an atrium and a ventricle on each side of the heart and the two sides can be considered separately. The right side of the heart receives blood from the tissues and pumps blood to the lungs, while the left side receives from the lungs and pumps blood to the tissues. These happen together each time the heart contracts. In this way, blood passes through the heart twice before returning to the tissues. 

YZ
Answered by Yuhui Z. Biology tutor

4149 Views

See similar Biology GCSE tutors

Related Biology GCSE answers

All answers ▸

Why are enzymes such as proteases and lipases used in some washing powders?


Describe and explain how the structure of the small intestine is adapted for absorbing the products of digestion.


Describe the steps in a reflex arc.


What is Osmosis?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning