Breathing and Exchange of GasesHard
Question
The figure shows a diagrammatic view of human respiratory system with labels A, B, C and D. Select the option which gives correct identification andmain function and/or characteristic :-
Options
A.D - Lower end of lungs - diaphragm pulls itdown during inspiration
B.A - trachea - long tube supported by complete cartilaginous rings for conducting inspired air
C.B - pleural membrane - surround ribs on both sides to provide cushion against rubbing
D.C - Alveoli - thin walled vascular bag like structures for exchange of gases