tom go
Dams
A dam
Structure that controls the flow of water.
Aswan Dam
The stomata in the leaf of the plant opens and closes depending on whether water is needed to exit or if there is not enough water in the leaf
It's called a dam. Usually made from wood or concrete. It's like a large wall that can hold back and control the flow of water.
A dam is built across a river to control the flow of water.
Valvs
gravity
watermelon
timber = wood dam = structure built to block/slow the flow of water so... timber dam is a wooden structure created to block or slow the flow of water.
That would be the throttle which controls the fuel flow to the engines.
Weir
The structure that controls the release of material from the stomach to the small intestine is the Illeocecal valve. The structure that functions to prevent entrance of food into the trachea is the epiglottis.