Q1
What organ pumps blood?
AThe heart
BThe lungs
CThe stomach
DThe liver
ICSEClass 6 (ICSE)ScienceCh 19 · Topic 2
Practice and Revision - The Circulatory System
Let us practise and revise what we learned about the circulatory system. The circulatory system pumps blood throughout the body, delivering
Core concept
The heart is a muscular organ that pumps blood, contracting and relaxing to push blood through blood vessels.
How it works
Arteries carry oxygen-rich blood away from the heart, while veins carry oxygen-poor blood back to the heart.
Why it matters
Blood contains red blood cells (carrying oxygen), white blood cells (fighting infection), and platelets (helping clotting).
Key detail
The circulatory system ensures every cell in our body receives the oxygen and nutrients needed to function properly.
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Quick notes
• The heart pumps blood throughout the body.
• It contracts and relaxes to push blood.
• Arteries carry oxygen-rich blood from the heart.
• Veins carry oxygen-poor blood to the heart.
• Red blood cells carry oxygen.
• White blood cells fight infection.
• Platelets help blood clot.
• The circulatory system delivers oxygen to all cells.