The Eustachian tube is supported by which type of cartilage?

While travelling at a higher altitude,a person complains of dizziness and vomiting sensation. Which part of the inner ear is disturbed during the journey?

The organ of Corti is located in the .....

The Eustachian tube connects . . . . . . with the . . . . . . .

Fenestra ovalis is the opening of

$A$ person going up to $10,000$ feet high in a hot air balloon may develop severe pain in the ear due to: