AND ABDOMINAL VISCERA. 23 



2. Adrenal Bodies — one on each side. They lie in- 

 ternal to the upper portion of the kidney, and are 

 surrounded by fat. Each is an elongated, yellowish 

 body about f in. in length. 



3. The Ureter emerges from the hilus of the 

 kidney, passes backward and inward to reach the 

 under surface of the bladder, into which it opens, well 

 down toward the neck. Make an opening in the 

 ureter about an inch from the bladder, and through 

 this opening pass a bristle or probe into the bladder. 

 Notice that the ureter runs obliquely in the wall of 

 the bladder some distance before it reaches the in- 

 terior. 



4. The Bladder is a thin-walled muscular sac 

 which when filled with urine projects some distance 

 above the symphysis pubis. 



Cut open the bladder and remove any Tt.rine that 

 may be present with a sponge. 



Determine the position of the opening of the 

 ureters internally. From each a white thickening of 

 the mucous membrane passes downward to the 

 urethra, inclosing a triangular area, the trigoiie. 



5. The Urethra, the duct of the bladder arises 

 from the lowest portion of the bladder. Its further 

 course will be seen in the dissection of the repro- 

 ductive system. 



6. The Internal Structure of the Kidneys. 

 Remove one from the body and slice it open along 



its long diameter, preferably a little to one side of the 

 mid-line. 



Each kidney has externally a fibrous investment 

 which can be peeled off easily with the forceps. The 

 proper substance of the kidney is divided into a cor- 

 tical and a medullary layer. 



