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.
Definition of RESPIRATION for Kids. 1. : the act or process of breathing: the inhaling of oxygen and the exhaling of carbon dioxide. 2. : the process by which cells use oxygen to break down sugar and obtain energy. the physical and chemical processes (as breathing and diffusion) by which an organism supplies its cells and tissues with the oxygen needed for metabolism and relieves them of the carbon dioxide formed in energy-producing reactions. 3. : cellular respiration.