Final answer:
Oxygen and carbon dioxide are exchanged in the lungs during breathing. The process involves oxygen moving from the alveoli into the bloodstream, while carbon dioxide moves from the bloodstream into the alveoli to be exhaled out of the body.
Step-by-step explanation:
Gases exchanged in the lungs during breathing are oxygen and carbon dioxide. Oxygen, which is inhaled from the air, is transferred from the alveoli (tiny air sacs in the lungs) into the bloodstream. On the other hand, carbon dioxide, which is a waste product produced by the body's cells, is transferred from the bloodstream into the alveoli and exhaled out of the body.
During the process of gas exchange, oxygen moves from an area of higher concentration (in the alveoli) to an area of lower concentration (in the bloodstream), while carbon dioxide moves from an area of higher concentration (in the bloodstream) to an area of lower concentration (in the alveoli).