Human body system where oxygen is absorbed and carbon dioxide released.

Organ that contains alveoli, bronchioles, and bronchi.

Which organs remove carbon dioxide from the blood stream?

_____ is the site of gas exchange.

The ______ is where air flows into air sacs

Gases move in and out of blood through the _____.

Pulmonary Artery is where _______

Lungs expand and contract in the ________.

What cellular process moves oxygen into the body cells?