Answer:
Moist walls - gases dissolve in the moisture helping them to pass across the gas exchange surface. Permeable walls - allow gases to pass through. Extensive blood supply - ensuring oxygen rich blood is taken away from the lungs and carbon dioxide rich blood is taken to the lungs.
Answer:
The goal of systematics is to organize living things into groups that have biological meaning. the science of naming and grouping organisms.
Explanation:
I’m pretty sure the answers are- Oxygen and glucose
Number 1 to 5 which would be that then answer
