Diffusion through the capillary walls allows _____.
A. oxygen to move from the blood to body cells
B. waste to move from the heart to the organs
C. glucose to move from body cells to the blood
D. arteries to regulate the flow of blood
A. oxygen to move from the blood to body cells
B. waste to move from the heart to the organs
C. glucose to move from body cells to the blood
D. arteries to regulate the flow of blood