32 



veflel?. d, the heart : immediately above is feen the 

 pulmonary artery, dividing into right and left : on 

 each fide of the letter are the cavities called the right 

 and left ventricles, and above are the thin cavities 

 of the heart, called its ears, or auricles, e, the aorta, 

 or great artery, coming out from the left ventricle ; 

 below the heart, is feen the great artery and vein, to 

 the left and right, called the pofterior aorta, and 

 pofterior cava, fff, the lobes of the lungs, gg, the 

 lobes of the liver, h, the gall duct, which is here 

 only a fingle pipe, without any bag or refervoir, as 

 in other animals, i, the ftomach. A:, the duode- 

 num, or firft gut, with the gall duct entering it at 

 the fame place with the pancreatic duct. /, the me- 

 fentery, or cav.l, feen hanging from the ftomach. 

 7?i, the fpleen. ?m, the kidneys, o, the great vein, 

 called the vena cava : at its fide is feen the aorta, or 

 great artery. ///?, the ureters, or pipes, conducting 

 the urine from the kidneys into the bladder, q, the 

 re<^um, or laft gut, lying in a natural ftate above 

 the bladder, rr, the fpermatic cords, or pipes, con- 

 veying the feed from the tefiicles towards the back of 

 the bladder, to penetrate the yard : one tefticle is 

 feen drawn out of the bag, that the paiTage of the 

 ipennatic cord may be feen. /, the bladder. 



Bones form the foundation of the machine, fup-t 

 porting the foft parti, and enabling them to be mov- 

 ed v,ithout injury. The progrefiion of a quadruped 



