Abstract
1. 1. The pO 2 of arterial and venous blood fell progressively until breathing was established. During hatching the pO 2 of arterial rose from 20 mm Hg to 110 mm Hg. 2. 2. The pO 2 of arterial blood rose to a maximum of 58 mm Hg by the eighteenth day of incubation. 3. 3. The packed cell volume rose during development but fell significantly after hatching. Little change in the mean corpuscular haemoglobin concentration was noted. 4. 4. The efficacy of the chorio-allantois as a site for gaseous exchange is discussed and the importance of a high pCO 2 and low pO 2 in simulating pulmonary respiration is considered.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
