answersLogoWhite

0

The respiratory system function is gases exchange, deoxygenated red blood cells (meaning, they're full of CO2) get to the lungs from the heart through the pulmonary artery, and when it reaches the alveoli, the CO2 gets exchanged for O2 from the alveolar sac, oxygenating the red blood cells, then the blood goes back to the heart through the pulmonary veins and gets pumped to the rest of the body through the aorta, the O2 gets exchanged back for the CO2 produced by the cells, then goes back to the heart. Rinse and repeat.

User Avatar

Wiki User

12y ago

What else can I help you with?