MICROANATOMY

Detailed explanation-1: -ALVEOLI are the very small air sacs where the exchange of oxygen and carbon dioxide takes place.

Detailed explanation-2: -Tiny air sacs at the end of the bronchioles (tiny branches of air tubes in the lungs). The alveoli are where the lungs and the blood exchange oxygen and carbon dioxide during the process of breathing in and breathing out.

Detailed explanation-3: -Blood rich in carbon dioxide travels to the heart, which pumps it to the lungs. Carbon dioxide goes from the capillaries around the alveoli into the alveoli. Then carbon dioxide goes up the bronchioles to the bronchi, and then to the trachea to be exhaled.

Detailed explanation-4: -Final answer: During respiration exchange of gases take place in the alveoli of the lungs.

Detailed explanation-5: -When you breathe in: Air enters your body through your nose or mouth. Air then travels down the throat through the larynx and trachea. Air goes into the lungs through tubes called main-stem bronchi.