For he saw that the lungs have cavities and pores, through which the liquids pass.

For the breath in expiration hath no need of pores, but that the liquids and those things which pass with them might go through, it is made like a strainer and full of pores.

Besides, sir, as to the example of gruel which you proposed, the lungs can discharge themselves of the thicker parts together with the thin, as well as the stomach.

For our stomach is not, as some fancy, smooth and slippery, but full of asperities, in which it is probable that the thin and small particles are lodged, and so not taken quite down.

But neither this nor the other can we positively affirm; for the curious contrivance of Nature in her operation is too hard to be explained; nor can we be particularly exact upon those instruments (I mean the spirit and the heat) which she makes use of in her works.