The figure shows a diagrammatic view of human
respiratory system with labels A, B, C and D.
Select the option which gives correct identification
and main function and / or characteristic.
(a) C - Alveoli - Thin walled vascular bag like
structures for exchange of gases.
(b) D - Lower end of lungs - Diaphragm pulls it
down during inspiration.
(c) A - Trachea - Long tube supported by complete
cartilaginous rings for conducting inspired air.
(d) B - Pleural membrane - Surround ribs on both
sides to provide cushion against rubbing.
respiratory system with labels A, B, C and D.
Select the option which gives correct identification
and main function and / or characteristic.
(a) C - Alveoli - Thin walled vascular bag like
structures for exchange of gases.
(b) D - Lower end of lungs - Diaphragm pulls it
down during inspiration.
(c) A - Trachea - Long tube supported by complete
cartilaginous rings for conducting inspired air.
(d) B - Pleural membrane - Surround ribs on both
sides to provide cushion against rubbing.