…the passage formed by the mouth, nose, throat, and lungs, through which air passes during breathing…
…a substance (such as hemoglobin or hemocyanin) with a molecule consisting of protein with a pigmented prosthetic group, involved in the physiological transport of oxygen or electrons…
…the ratio of the volume of carbon dioxide evolved to that of oxygen consumed by an organism, tissue, or cell in a given time…
…a paramyxovirus that causes disease of the respiratory tract. It is a major cause of bronchiolitis and pneumonia in young children and may be a contributing factor in sudden infant death syndrome…
