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In the respiratory tract, gas exchange takes place in the alveoli of both of the lungs. The alveoli are small sacs of air that are covered in a material known as surfactant. This substance allows the alveoli to expand an... More »

www.reference.com Science Chemistry States of Matter

Earthworms actually breathe through their skin, which means that their mechanism for gas exchange involves their entire body. This means that oxygen comes in through the skin and that carbon dioxide ultimately exits the ... More »

www.reference.com Science Biology

Gas exchange occurs in the alveoli of the lungs. In these alveoli, carbon dioxide moves from the red blood cells into the alveoli, and oxygen moves from the alveoli into the red blood cells. More »

www.reference.com Science Chemistry States of Matter
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Gaseous exchange takes place in the lungs' alveoli, which are tiny sacs found at the ends of the terminal bronchioles. The gases that are exchanged are oxygen and carbon dioxide. More »

www.reference.com Science Chemistry States of Matter

Gas exchange occurs in the alveoli of the lungs. In these alveoli, carbon dioxide moves from the red blood cells into the alveoli, and oxygen moves from the alveoli into the red blood cells. More »

www.reference.com Science Chemistry States of Matter

In the respiratory system, gas exchange occurs between the alveoli in the lungs and the capillaries. Alveoli are small cavities lined with thin membranes. The cavities expand and contract as a person breathes. Humans hav... More »

www.reference.com Science Human Anatomy

Pulmonary alveoli are the tiny sacs inside the lungs that fill with air with each breath and facilitate the exchange of gas with the blood. According to HowStuffWorks, the oxygen concentration in the alveoli is high, rel... More »

www.reference.com Science Human Anatomy Organs