title: Gas exchange by a bird's embryo.
mesh_terms: D000818:Animals; D001693:Biological Transport, Active; D001834:Body Water / Q000502:physiology; D002245:Carbon Dioxide / Q000097:blood / Q000378:metabolism; D002642:Chick Embryo / Q000378:metabolism / Q000502:physiology*; D004058:Diffusion; D008566:Membranes / Q000502:physiology; D010100:Oxygen / Q000097:blood / Q000378:metabolism; D010313:Partial Pressure; D010539:Permeability; D012123:Pulmonary Ventilation; D012119:Respiration
chemical_list: D002245:Carbon Dioxide; D010100:Oxygen