circulatory system

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1.
1 point
The circulatory system is most like a ______________.
2.
1 point
Where does the blood go from the right side of the heart?
3.
1 point
Which blood cell clots blood?
4.
1 point
Why does your blood change colors?
5.
1 point
Which part of the heart receives incoming blood?
6.
1 point
Which blood cell carries oxygen and carbon dioxide?
7.
1 point
How are arteries different from veins?
8.
1 point
Why does your body need oxygen?
9.
1 point
Which of the following is a function of the circulatory system?
10.
1 point
What separates the right side of the heart from the left side?
11.
1 point
What causes AIDS?
12.
1 point
Which part of the heart is oxygen-rich?
13.
1 point
Why are capillaries important to the circulatory system?
14.
1 point
Which blood cell fights off infection?
15.
1 point
Which blood vessel is oxyen-rich and takes blood away from the heart?