1. (

• respiration ,
• internal_respiration ,
• cellular_respiration

) the metabolic processes whereby certain organisms obtain energy from organic molecules; processes that take place in the cells and tissues during which energy is released and carbon dioxide is produced and absorbed by the blood to be transported to the lungs ;

2. (

• respiration ,

) a single complete act of breathing in and out; "thirty respirations per minute" ;

3. (

• breathing ,
• external_respiration ,
• respiration ,
• ventilation ,

) the bodily process of inhalation and exhalation; the process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation ;