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- 1. Multiple Choice
In what way is blood the body's liquid messenger?
Blood delivers electrical messages from the brain to the rest of the body.
Blood delivers nutrients and oxygen to the body's cells.
Blood carries nutrients from the stomach to the intestines.
Blood delivers water to the body's organs.
- 2. Multiple Choice
If you wanted to see red blood cells being created, where would you look?
Inside your lungs
Inside your liver
Inside your bones
Inside your heart
- 3. Multiple Choice
What can you infer about plasma from the fact that it's almost completely clear?
It's almost completely made of water.
It contains a lot of oxygen.
It helps fight infections.
It cannot be found in the bloodstream.
- 4. Multiple Choice
Which of these pictures shows an erythrocyte?
- 5. Multiple Choice
What can you conclude about an erythrocyte that's bright red in color?
It is helping your body heal a cut
It is fighting a pathogen
It's full of oxygen
It is on its way to the lungs to pick up more oxygen
- 6. Multiple Choice
How does a red blood cell attach oxygen to itself?
With plasma
With hemoglobin
With platelets
With erthryotyes
- 7. Multiple Choice
How do white blood cells compare to red blood cells?
White blood cells contain more oxygen than red blood cells
There are more white blood cells than red blood cells
White blood cells are smaller than red blood cells
White blood cells are bigger than red blood cells
- 8. Multiple Choice
How do some white blood cells fight invading germs?
They force them out of the bloodstream.
They swallow them
They stun them with special chemicals
They attach oxygen to them.
- 9. Multiple Choice
What is the main function (job) of platelets?
Delivering oxygen to your body's organs.
Fighting invading germs.
Helping your blood clot.
Preventing your blood from coagulating.
- 10. Multiple Choice
The average person has around ____ pints of blood.
10
300
3
20
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