Biology, 04.11.2021 19:40 myiacoykendall

Ez questions- : Fill in the blanks:

a. The circulatory system is made up of the heart plus all of the blood vessels and .

b. When we breathe, a large muscle called the helps us draw oxygen into our lungs.

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Ez questions- : Fill in the blanks:

a. The circulatory system is made up of the heart...

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