Which structure is composed of yellow elastic cartilage?

$A$ thin-elastic cartilaginous flap which prevents the entry of food into the larynx is known as

In which animal does the tongue help in thermoregulation?

The figure shows a diagrammatic view of the human respiratory system with labels $A, B, C$,and $D$. Select the option which gives the correct identification and main function and/or characteristic.

Food does not normally enter the trachea because during swallowing of food

Where does oxygen finally reach from the lungs?