Humans breathe rapidly during exercise than before it because during exercise the blood contains?

Humans breathe more rapidly during exercise because more oxygen is needed (inhalation) and carbon dioxide must be removed (exhalation). Both oxygen and carbon dioxide are carried through the blood by a molecule in red blood cells called Hemoglobin. Exhalation of carbon dioxide is crucial for blood pH regulation. If blood pH gets too low, respiration increases to remove the excess carbon dioxide. Sometimes there is too much acid in the body and vomiting will occur to get the acid out. This sometimes happens when people exercise anaerobically very intensely at the beginning of a workout.