But besides those we have mentioned to confirm Plato's opinion, let us produce Philistion of Locri, very ancient and very famous physician, and Hippocrates too, with his disciple Dioxippus; for they thought of no other passage but that which Plato mentions.

Dio says, that when we feed, the moist parts are about that separated from the dry, and the first are carried down the windpipe, the other down the weasand; and that the windpipe receives no parts of the food, but the stomach, together with the dry parts, receives some portion of the liquids.

And this is probable, for the epiglottis lies over the windpipe, as a fence and strainer, that the drink may get in by little and little, lest descending in a large full stream, it stop the breath and endanger the life.

And therefore birds have no epiglottis, because they do not sup or lap when they drink, but take up a little in their beak, and let it run gently down their windpipe.
These testimonies I think are enough; and reason confirms Plato's opinion by arguments drawn first from sense.

For when the windpipe is wounded, no drink will go down; but as if the pipe were broken it runs out, though the weasand be whole and unhurt.