There it is again moistened with _saponaceous liquid_, or _pancreatic juice_; by which and by a perpetual motion of the stomach, it is brought into a state of digestion; then by small degrees entered through the _pylorus_ or porter, into the first division of the gut, the _duodenum_.
This gut is about twelve fingers long; and whilst the aliment is there, it is intermixed with the gall, which is a liquor separated by the liver, and contained in the gall bladder; this liquor, the gall, is carried into the _duodenum_, by a small duct, called the _ductus cysticus_; where also enters another kind of liquor called the _pancreatic juice_.
When the aliment is thus prepared, and fit for a particular state of dissolution, it is carried into, and through the _jejunum_. This gut is in length about twelve or thirteen hands breadth, and its motion somewhat brisk; through which the aliment passes pretty quick, and hence, generally is somewhat empty.
As it passes through this part, the chyle is separated from it by the lacteals, which are small vessels that separate the chyle from the aliment, and abound there more than in any other part of the gut.
From thence it comes into the _ileum_; that is the longest of all the divisions of the guts, and is in length about twenty-one hands breadth; it has a great many circumvolutions, and next to the _jejunum_, has many lacteals to separate the chyle.
Now the aliment comes into the wide gut, and gradually becomes fæces; and first, the _cæcum_: This part is rather an appendix only, and hangs from the main part like a finger to a glove. The use of this gut has been much controverted by anatomists; it seems however, very probable, that this appendix is designed to keep the aliment in for further digestion, as it now begins to putrefy, and becomes fæces or excrement.
From thence it enters the _colon_, which is a long, and very winding intestine; it runs up along and about the liver, touches the gall bladder, and the spleen; from thence it descends again to the _os sacrum_. It has but few lacteals, and is, as it were, the last drainer of the fæces: It is this intestine which is the seat of the Colic, and of most other complaints of the belly.
Next to this comes the last and straightest, the _rectum_; this gut is closely adherent to the _sacrum_, and ends in the fundament; which is provided with muscles to open and shut the _anus_, in order to contain the fæces, and discharge it.