1. What is meant by partial pressure and why is it important during gas exchange? 2. How does the respiratory media affe

[answerhappygod]

1. What is meant by partial pressure and why is it important
during gas exchange?
2. How does the respiratory media affect respiratory structures
and gas exchange?
3.Regardless of what environment an animal lives in, what common
features are seen in the respiratory surfaces for gas exchange?
What role does counter-current exchange play during gas
exchange?
4. How does the tracheal system of insects compare and contrast
with the lung system of vertebrates? provide three similarities and
three differences in your answer.