Question

why does carbon dioxide enter the capillaries from cell?​

Answer 1

oxygen diffuses from the blood where there is a greater concentration to the cell where there is a lower concentration.

the partial pressure of oxygen is high in the alveoli and low in the blood of pulmonary capillaries therefore carbon dioxide diffuses across the respiratory membrane from the blood into the alveoli and the amount of Oxygen and carbon dioxide that diffuses across the respiratory membrane is similar

Answer 2

Answer:

capillaries are the merging point of arteries and veins and arteries contain oxygenated blood and veins contains deoxyenated blood