Do you have links to these studies?
No, I will look
This is great on cardiac differences. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8980481/#:~:text=Our%20study%20finds%20that%2C%20compared,generates%20a%20smaller%20cardiac%20output. Smaller Heart lower cardiac out put.
This should cover Resp anatomy and physiology. https://err.ersjournals.com/content/31/163/210074