Question

What causes an increases in the level of CO2 in the blood present in venacavae and the level of oxygen in the blood present in pulmonary veins

Answer 1

Explanation:

Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveol