MASTICATION
act of swallowing
Only when you are in the act of swallowing it.
It doesn't.
food and liquid may enter the trachea during the act of swallowing.
Yes and no. The initial phases of swallowing are under voluntary control, but swallowing takes several different muscles to act in a synchronized way and after initiation of the swallow, the later phases are automatic and not voluntary.
The epiglottis is the thin elastic cartilaginous structure located at the root of the tongue that folds over the glottis to prevent food and liquid from entering the trachea during the act of swallowing.
Assuming you are eating, the act or chewing is mastication and swallowing is peristalsis. Vomiting is reverse peristalsis.
There are muscles that line the esophagus to guide the food (bolus) down to the stomach. Contrary to the typical assumption, it is not gravity that powers the act of swallowing. For this reason, you can eat upside down although it isn't recommended.
person cut in half, sword swallowing, disappearing act, knife throwing
The Sugar Act
Brutus' wife Portia commits suicide (by swallowing live coals, a nasty way to go) in Act IV. Brutus, Cassius and various members of their army commit suicide in Act V.