Q1
How many chambers does the heart have?
AFour
BTwo
CSix
DOne
ICSEClass 8 (ICSE)ScienceCh 23 · Topic 1
The Circulatory System
The circulatory system pumps blood through the body using the heart, blood vessels, and blood, delivering oxygen and nutrients to all cells.
Core concept
The heart has four chambers - two atria and two ventricles - working together to pump blood to the lungs and the rest of the body.
How it works
Arteries carry oxygenated blood away from the heart, while veins carry deoxygenated blood back, with capillaries connecting them at the cellular level.
Why it matters
Blood consists of plasma (liquid), red blood cells (oxygen transport), white blood cells (immunity), and platelets (clotting).
Key detail
Understanding the circulatory system helps us appreciate how our body delivers essential resources and maintains overall health.
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• The heart has four chambers: two atria, two ventricles.
• They pump blood to lungs and body.
• Arteries carry oxygenated blood from the heart.
• Veins carry deoxygenated blood to the heart.
• Capillaries connect arteries and veins at cells.
• Blood has plasma, red cells, white cells, platelets.
• Red cells transport oxygen.
• White cells provide immunity; platelets aid clotting.