What is the working of alveoli in lungs

The alveoli are where the lungs and the blood exchange oxygen and carbon dioxide during the process of breathing in and breathing out. Oxygen breathed in from the air passes through the alveoli and into the blood and travels to the tissues throughout the body.

The alveoli are where the lungs and the blood exchange oxygen and carbon dioxide during the process of breathing in and breathing out

answer 2 is the right one. jim should measure his snack to make sure he is using the right serving size.

there should be recorded video of the class under the assignments for the day