title: Countercurrent exchange of highly diffusible tracers in skeletal muscle: its absence in the lung.
mesh_terms: D000818:Animals; D000983:Antipyrine / Q000378:metabolism; D002199:Capillary Permeability; D002245:Carbon Dioxide / Q000097:blood / Q000378:metabolism; D002415:Cats; D002860:Chromium Radioisotopes / Q000097:blood / Q000378:metabolism; D003377:Countercurrent Distribution; D004058:Diffusion; D005260:Female; D007457:Iodine Radioisotopes / Q000097:blood / Q000378:metabolism; D007504:Iron Radioisotopes / Q000097:blood / Q000378:metabolism; D008168:Lung / Q000098:blood supply / Q000378:metabolism*; D008297:Male; D009132:Muscles / Q000098:blood supply / Q000378:metabolism*; D011652:Pulmonary Circulation; D011849:Radioactive Tracers / Q000097:blood / Q000378:metabolism*; D011868:Radioisotopes / Q000378:metabolism*; D013997:Time Factors; D014316:Tritium / Q000097:blood / Q000378:metabolism
chemical_list: D002860:Chromium Radioisotopes; D007457:Iodine Radioisotopes; D007504:Iron Radioisotopes; D011849:Radioactive Tracers; D011868:Radioisotopes; D014316:Tritium; D002245:Carbon Dioxide; D000983:Antipyrine