title: Pulmonary circulation: introduction.
mesh_terms: D003097:Collateral Circulation; D003326:Coronary Circulation; D006801:Humans; D006976:Hypertension, Pulmonary / Q000503:physiopathology*; D008173:Lung Diseases, Obstructive / Q000503:physiopathology; D005082:Physical Exertion; D011652:Pulmonary Circulation; D011654:Pulmonary Edema / Q000503:physiopathology; D011655:Pulmonary Embolism / Q000503:physiopathology