Plz help me
Based on the diagram oxygen flows through the circulatory system in which order

A. 1, 2, 4
B. 2, 1, 3
C. 5, 3, 1
D. 3, 2, 4

Plz help me Based on the diagram oxygen flows through the circulatory system in which order A 1 2 4 B 2 1 3 C 5 3 1 D 3 2 4 class=