mouth and stomach, the aliment descends into the in- 

 testines, where it receives a new preparation by the mix- 

 ture of two liquors, one of which is furnished by the 

 liver, and is called the bile ; and the other by a species 

 of* gland situated under the stomach. 



The aliment is thus converted into a kind of greyish 

 pulp, which has received the Dame of chyle. ^ Being 

 shifted from place to place by the vermicular or peris- 

 taltic motion of the intestines, and strongly pressed 

 against tiieir sides at the instant of their contraction, 

 the chyle penetrates into extreme small vessels,^ which 

 open themselves in the internal membrane of the intesti- 

 nal canal. These vessels transmit the chyle to very 

 small glands which are covered with a kind of mem- 

 brane | situated in the midst of the intestines, and round 

 which they are in a manner rolled. After being filtrated 

 in these glands, the chyle is received by other vessels, |[ 

 which convey it into a concavity placed along the spine, 

 and which pours it into a vein situated under the left 

 clevieie.- There it enters into the blood, and loses the 

 name of chyle. From this vein the new blood passes 

 into the upper branch of the principal trunk of veins, 

 which carries it towards the heart. It passes into the 

 right lobe, which opens at its approach, and by closing 

 immediately, forces it into the right ventricle which 

 is dilated in order to receive it. The heart instantly 

 contracts itself; the valves with which the ventricle is 

 furnished, raising themselves to oppose the reflux of 

 the blood into the lobe, it is compelled to pass the ar- 

 tery, which is appointed to carry it to the lungs. The 

 valves, which are placed at the entrance of this artery, 

 sink down; the artery dilates, and the blood advances 

 into the cavity. The valves rise again, and prevent its 

 return towards the heart. The artery contracting itself, 

 the blood is impelled farther, and by these alternate di- 



The pancreas and pancreatic juice, t The primary lacteal veins* 



\ The mesentery and mesenteric glands. 

 H The secondary lacteal veins. The thoracic duct. 



