Well silly we would all be dead if it wasnt bonded right
The principal of falsifiability would be correct.
Your answer would be D, Systemic circulation carries oxygenated blood to the body and pulmonary circulation carries deoxygenated blood to the lungs.
These two circulations are part of the circulatory system, with the pulmonary circulation taking deoxygenated blood to the lungs and returning it oxygenated with the oxygen we breathe in, then that oxygenated blood going around the body delivering that oxygen and coming back deoxygenated.
Hope this helped!
MJ Schleiden, Theodor Schwann and Rudolf Virchow are credited for the events described in the development of the cell theory.