Source:http://linkedlifedata.com/resource/umls/id/C0035245
CSP: physiological activity and functions of the respiratory system as a whole or of any of its parts, including any portion of the breathing process, the exchange of oxygen and carbon dioxide and internal (cellular) or external respiration (ventilation).,MSH: Physiological processes and properties of the RESPIRATORY SYSTEM as a whole or of any of its parts.