TORONTO -. Mike Babcock's first exhibition schedule as coach of the Maple Leafs will take him to some interesting arenas.
There are two types of 'respiration': pulmonary (visible breathing) and cellular (which is not visible). In pulmonary respiration the unwanted gas expelled is mainly carbon dioxide. This is then replaced during the inhalation breathing phase by the oxygen content in the air.
RESPIRATION is the reaction that converts oxygen and glucose into carbon dioxide, water and releases ENERGY to be used elsewhere! Diagram of breathing (credit to OpenStax College) Organisms need energy to move, to keep warm, to perform digestion and other chemical processes, etc.