Valve

The novel introduced a race of beings who possessed a natural valve within their bodies, enabling them to teleport at will.

The firefighter turned the valve to activate the sprinkler system and extinguish the flames.

The researcher studied the functioning of the respiratory valve in insects.

The researcher examined the valve in the insect's respiratory system to understand its breathing mechanism.

The snail's shell had a tiny valve that allowed it to control the amount of water inside.