1.6 Flashcards
1
Q
What are spiracles?
A
Openings in insects that allow air to flow into their tracheae
2
Q
How do birds maintain continuous gas exchange?
A
Through a system of air sacs that ensure constant airflow through lungs during both inhalation and exhalation
3
Q
What structures allow fish to extract oxygen from water?
A
Gills with numerous thin-walled lamellae containing blood vessels
4
Q
What is unique about bird lungs compared to mammal lungs?
A
Bird lungs don’t expand/contract and lack alveoli, using air sacs instead
5
Q
What are air sacs?
A
Specialized structures attached to bird lungs that help maintain continuous airflow through the respiratory system
