Respiratory System Flashcards
1
Q
What do avians have instead of lungs?
A
Air sacs
2
Q
Why do avians possess air sacs instead of lungs?
A
Allows them to remain light enough for flight
3
Q
What type of respiratory system do avians have?
A
Double respiratory system
4
Q
What type of respiratory system do mammals have?
A
Single respiratory system
