It's a flap of skin at the back of the throat - called the 'Epiglottis'
Epiglottis
It is a flap of skin that stops food from going down the windpipe
to do a flip flap you press up and then down down then up for a flap flop
There is a flap that connects the esophogus with the trachea. The flap opens when you breathe or talk. The flap closes when you swallow food. If you talk or breathe while you eat food. the flap opens and food goes down to your lungs. Then, you choke.
The epiglottis.
The epiglottis is a flap of tissue that prevents food from entering the windpipe (trachea) when swallowing. It acts as a cover for the trachea, ensuring that food only goes down the esophagus to the stomach.
The flap of tissue that closes when you swallow is called the epiglottis. It is located at the base of the tongue and helps to prevent food and liquids from entering the trachea (windpipe) during swallowing, directing them instead to the esophagus.
The epiglottis is a flap of tissue at the back of the throat that prevents food from going into trachea when being swallowed .
The flap that covers the trachea is called the epiglottis. Its main function is to prevent food and liquid from entering the trachea when swallowing, ensuring these substances go down the esophagus instead.
The epiglottis is a flap that acts like a "door" and seals off your airway while you are swallowing food, and then opens to allow you to breathe when you are not swallowing food. When you are eating, make sure that you do not talk, as this interferes with the function of the epiglottis and can cause food to enter your airway.
Down, the flap that I think you're referring to is the epiglottis which closes of your respiratory airway when you swallow so food is directed down the esophagus instead.