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What does the circulatory system carry around the body?
Only oxygen
Food and oxygen
Only water
Which organ pumps blood around your body?
The lungs
The liver
The heart
How big is your heart?
About the size of a football
About the size of a coin
About the size of your fist
Where is your heart found?
In the centre of your chest
In your upper back
In your chest, slightly to the left
What protects the heart?
The skin
The ribs
The spine
What is the heart made of?
A special muscle
Fat tissue
Cartilage
What is it called when the heart pumps blood around the body?
Respiration
Digestion
Circulation
How many main parts does the circulatory system have?
Three — heart, blood vessels and blood
Two — heart and blood
Four — heart, lungs, blood vessels and blood
Which blood vessels carry blood AWAY from the heart?
Veins
Arteries
Capillaries
Which blood vessels carry blood back TOWARDS the heart?
Veins
Arteries
Capillaries
Which vessels join arteries and veins and are very narrow?
Venules
Arterioles
Capillaries
Why must the heart pump blood to the lungs first?
To warm the blood
To pick up oxygen
To remove waste
What does blood pick up in the lungs?
Carbon dioxide
Oxygen
Nitrogen
What do veins usually carry?
Blood with lots of nutrients
Blood with lots of oxygen
Blood with wastes like carbon dioxide
Which vessels from the lungs are special?
They are the widest veins in the body
They are the only veins that carry blood with oxygen
They are the only vessels with valves
What does blood carry away from the body's parts?
Extra nutrients
Extra oxygen
Waste products like carbon dioxide
