which is a flap of tissue that folds down to close

Cells make tissue and tissue makes what?

As "flap" is too informal, how can I replace it? Can you also tell me if the alternatives in parenth...

What is the small flap at the back of your throght that keeps you from choking

What is a small flap of tissue that closes the windpipe when you tomorrow food to keep you from chok...

The flap of tissue that covers the trachea while food or drink passes through is called the: (1 poin...

4. The flap of tissue that prevents food from entering the windpipe is called _____. the esop...

one tissue of is ______ tissue.

Question