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Biology 12 Online
OpenStudy (anonymous):

the circulatory system includes the a. lungs, heart, and brain b. lungs, blood vessels, and heart c. heart, blood, and blood vessels d. heart, arteries, and veins

OpenStudy (anonymous):

@Tootles143

OpenStudy (anonymous):

What do you think it is?

OpenStudy (anonymous):

d

OpenStudy (anonymous):

I was thinking the same thing either that or B.

OpenStudy (anonymous):

ok thank you

OpenStudy (anonymous):

yw. Anytime. :)

OpenStudy (anonymous):

Lungs are respiratory system so not a or b

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