Advertisement

What is carbon dioxide?

Carbon dioxide, a waste product, passes from the blood into tiny sacs in the lungs called alveoli. The lungs then get rid of carbon dioxide when people breathe out, or exhale. The more healthy alveoli there are, the easier the air can get in and out.

Carbon dioxide is a colorless, odorless gas. It is a waste product made by the body. Carbon dioxide travels in the blood from the body's tissues to the lungs. Breathing out clears carbon dioxide from the lungs.

This answer is based on source information from the National Cancer Institute.

Continue Learning about Parts of the Respiratory System

What is the role of the diaphragm in my body?
National Athletic Trainers' AssociationNational Athletic Trainers' Association
When the diaphragm contracts, it flattens out, lowering the pressure in the lungs and allowing air i...
More Answers
What are airways?
Jumo HealthJumo Health
Airways are the tubes that carry air into the lungs and back out again. The airways start off big. T...
More Answers
What is the diaphragm?
Pam GroutPam Grout
The diaphragm is the all-important dome shaped muscle between the stomach and the chest that  automa...
More Answers
What are the benefits of deep nasal breathing?
Dr. Michael Roizen, MDDr. Michael Roizen, MD
Deep nasal breathing isn't just for yoga rooms and massage tables. Dee-ee-ee-ee-ee-ee-ee-p brea-ea-e...
More Answers

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.