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 # 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 urine 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 ¢rvzgone. 
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 zt open along 
ats long diameter, preferably a little to one side of the 
mia-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. 
