I have a few general questions
Pulmonary circulation: What is it? What is the specific purpose?What structures are involved? What's the function?
Lymph Nodes: What is it? What specifically does it do? Where isit found specifically?
Explain why there are different blood groups ALSO why is it thata person with Blood type O is incapable of receiving blood fromblood type B?
Lastly
Describe the circulatory system between avian and non avianreptiles what are the main differences and why do those differencesexist?