Each again is divided into three parts: the _tenuia_, or small narrow intestines, are the _duodenum_, or twelve finger-gut; the _jejunum_; the _ileum_: The wide or _crassa_, is divided into the _cæcum_; the _colon_; and the _rectum_. Throughout the whole canal of intestines are numbers of little vessels, called _lacteals_, which lead the chyle, extracted from the aliment, into a _receptacle_, which is lodged in the _mesentery_, and from thence, by another duct call’d the _thoracic duct_, is carried along the back-bone upwards, and joins to the left subclavian vein, where the _chyle_ gradually commences to be blood. This short description we will let suffice, and now enter upon the action itself. The morsel now, which is designed for food, is taken into the mouth, masticated with the teeth, turned about with the tongue; and as the mouth is at work, the _saliva_ or spittle is squeezed from the salival glands, and thus intermixed with the aliment; when enough chewed and moistened with this saliva, it is conveyed to the _pharynx_, or swallow, which receives it, and, by its contraction, forces it into the _oesophagus_; and by a repeated contraction, is carried down into the stomach. 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.