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Mathematics 21 Online
OpenStudy (readergirl12):

What is the main function of the circulatory system in multicellular organisms? A. to bring oxygen into the lung B. to put carbon dioxide into all blood vessels C. to expel waste products from the body D. to transport materials throughout the body Yet again,Bio isn't helping me. ;-;

OpenStudy (anonymous):

d

OpenStudy (anonymous):

wrong place sleek-feathered one

OpenStudy (readergirl12):

Lol ^...Anyways Thank you @PhisicsStudent c:

OpenStudy (anonymous):

Lol ... :* ...np.... sleek feathered :D

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