calculated lung weight right lung weight to left lung weight ratio A calculated measurement in which the weight of the right lung (the lung on the side of the body to the south when the organism is facing east) is divided by the weight of the left lung of the same individual and presented as a ratio, fraction, quotient or percentage. The lungs are the organ component of the respiratory system responsible for the exchange of gases between the environment and the blood. Weight is the heaviness or degree to which a body (or a part of the body such as an organ) is drawn toward the earth by gravity. CMO:0000103 Note that "left" and "right" in this context refer to the perspective of the organism, not that of the observer. (Reference: Wikipedia, Anatomical_terms_of_location). clinical_measurement_ontology right lung weight/left lung weight ratio