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- 1. Multiple Choice
The _________system carries oxygen and nutrients to all parts of our bodies?
respiratory
circulatory
- 2. Multiple Choice
What is the main organ of our circulatory system?
heart
skin
- 3. Multiple Choice
The heart is about the size of your ________.
brain
fist
- 4. Multiple Choice
What do we call the movement of blood through the heart and around the body?
circulation
digestion
- 5. Multiple Choice
What do we call the tiny tubes that carry blood AWAY from the heart?
valves
arteries
- 6. Multiple Choice
What do we call tiny tubes that RETURN oxygen poor blood back to the heart?
veins
ventricles
- 7. Multiple Choice
What do we call the smallest blood vessels in our bodies?
capillaries
cells
- 8. Multiple Choice
The part of the blood that helps you stop bleeding when cut yourself is called _____________.
red blood cells
platelets
- 9. Multiple Choice
The part of the blood that carries oxygen is called ___________. (Remember we can't live without our blood-line)
red blood cells
white blood cells
- 10. Multiple Choice
The part of the blood that fights off harmful bacteria and viruses is called _______________.
red blood cells
white blood cells
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