Gas Exchange

Respiration is the transport of oxygen to the cells within tissues and the transport of carbon dioxide in the opposite direction.

Cellular respiration is the metabolic process by which an organism obtains energy through the reaction of oxygen with glucose.

Hemoglobin is the primary transporter of oxygen with an oxygen binding capacity between 1.36 and 1.37 ml O₂ per gram Hgb.

CO₂ is carried in blood in three different ways: dissolved in plasma, bound to hemoglobin, or as a biocarbonate ion.