Kirk chastised himself for not remembering that they had no hearing organs.

He worked through the pain, forming primitive hearing organs inside the skull cavity.

Let me emphasize at this point that the hearing organ is not what we commonly think of as the ear.

The fruit fly's hearing organ is less than half a millimeter long and consists of several segments.

The hearing organ is reduced to small remains.

These vibrations are transmitted to the hearing organ in the inner ear.

The blow eventually impaired the hearing organs in both ears, and he gradually went deaf.

But since these caterpillars have no hearing organs, what they sense instead is the vibrations transmitted across the leaf.

However, they may actually have a larger hearing organ for lower sound wave frequencies.

Although these insects' hearing organs are rather like our eardrums, they do not necessarily respond to sound in the same way.