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 can refer to: Cellular respiration, which is the use of oxygen in the metabolism of organ ic molecule s. Physiological respiration, which exchanges oxygen and carbon dioxide between an organ ism and the external environment.