Blood is pumped to the lungs where carbon dioxide leaves the blood and oxygen enters the blood.

A. pulmonary circulation
B. systemic circulation
C. cardiovascular system

Which scientific design has both practical limitations and limitations due to scale? studying the effect of bleach on the growth of mold spores exposing cultures of duckweed to different intensities of light observing the replication of dna molecules with a hand lens using colored marbles to model a cross between two colors of rabbits