Question

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

Answer 1

The main function of the circulatory system in multicellular organisms is to transport materials around. There are other functions, too, but this is by far the biggest one. HOPE THIS HELPS!

Answer 2

D. to transport materials throughout the body