When the lungs inhale oxygen what doesit exhale as waste?

The primary waste product that the lungs exhale during the process of respiration is carbon dioxide (CO2). When we inhale air, oxygen (O2) is taken up by the lungs and transported to the various tissues and organs of the body through the bloodstream. Within the cells, oxygen is utilized for various metabolic processes that produce energy and carbon dioxide as a waste product.

The carbon dioxide produced as a result of cellular respiration diffuses back into the bloodstream and is transported to the lungs. In the lungs, the carbon dioxide is exchanged for oxygen during the process of exhalation. This exchange occurs in the tiny air sacs known as alveoli, where oxygen from the inhaled air passes into the bloodstream while carbon dioxide passes from the bloodstream into the exhaled air.

In summary, during inhalation, the lungs take in oxygen, and during exhalation, they release carbon dioxide as a waste product of cellular respiration.