title: Respiratory gas exchange by the avian embryo.
mesh_terms: D000818:Animals; D002245:Carbon Dioxide / Q000032:analysis / Q000378:metabolism; D002642:Chick Embryo / Q000378:metabolism*; D004058:Diffusion; D009584:Nitrogen / Q000378:metabolism; D010100:Oxygen / Q000032:analysis; D010101:Oxygen Consumption; D010313:Partial Pressure; D010539:Permeability; D012119:Respiration; D014867:Water / Q000378:metabolism
chemical_list: D014867:Water; D002245:Carbon Dioxide; D009584:Nitrogen; D010100:Oxygen