Read the following summary, which describes a body process. Then, answer the question.
Blood enters the right side of the heart and travels to the lungs. There, the lungs eliminate carbon dioxide and exchange it for more oxygen. The oxygen-rich blood enters the left side of the heart. Then, arteries carry blood away from the heart.
What process is being described?
Group of answer choices
Circulation
Excretion
Immune response
Respiration