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- 1. Multiple Choice
What is the main organ of the circulatory system?
small intestine
bone
lungs
heart
- 2. Multiple ChoiceHow many types of blood vessels are in our body?1234
- 3. Multiple Choice
Arteries carry oxygen rich blood away from the heart.
True
False
- 4. Multiple Choice
Veins carry oxygen poor blood back to the heart.
False
True
- 5. Multiple Choice
The job of the heart is to . . .
pump blood around the body.
send food to the small intestines.
break down food.
give energy to the body.
- 6. Multiple Choice
The heart is about the size and shape of your . . .
head
fist
hand
foot
- 7. Multiple Choice
How does the heart work?
It pumps blood first to the lungs, back to the heart and then around the rest of the body.
It pumps blood first to the rest of the body, back to the lungs and then to the heart.
It pumps blood around the rest of the body, back to the heart and then to the lungs,
- 8. Multiple Choice______________ are the smallest blood vessels.ArteriesVeinsCapillaries
- 9. Multiple ChoiceThe circulatory system works with the ___________ system to provide our body with oxygen.respiratorydigestivemuscularskeletal
- 10. Multiple ChoiceThe circulatory system works with the __________ system to obtain energy from nutrients that we eat.respiratorydigestiveskeletalnervous
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