Each alveoli Triples in size with each breath *

Lungs are remarkable organs that continuously achieve amazing feats, which they do so well that we take them for granted, except when their function is diminished. It all happens in a space inside your chest, divided in two and reduced by the presence of the heart, the great vessels and the esophagus.

With Supreme Court Justice Ruth Bader Ginsburg having recently returned to the court after surgery for lung cancer, I have been asked a lot of questions about the lungs, as I am a professor of anatomy.

Explanation:

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.