Practium IV. The Kidney. 29 



blown into this cavity toward the ureter, it will sometimes traverse the 

 latter and enter the bladder so as to inflate it. 



a. In PI. XI the plane of section is nearly equidistant between the dorsal and the 

 ventral surfaces of the organ ; but if the section is made nearer either of these surfaces 

 the cavity will be larger and there will be four pyramids resembling in outline the single 

 papilla which they converge to form ; Anatomical Technology, Fig. 86. In the human 

 kidney there are several papillae. 



30. Transect the right kidney so as to gain an idea of the relative 

 positions and colors of the two portions, the ectal or cortical portion con- 

 sisting largely of the glomeruli^ and the ental or medullary part consist- 

 ing largely of tubules ; PI. XI. 



a. A section of the kidney, especially when fresh, seems to indicate the existence of 

 a third or intermediate zone ; it was particularly distinct in the specimen from which Fig. 

 19 was made. Injected preparations show that it is a vascular portion of the medullary 

 zone. 



31. The Uterus. In the female, between the bladder and the 

 rectum is a hollow, fleshy organ, the UTERUS or womb, PI. XI ; it is Y- 

 shaped, the mesal stem caudad, the two branches extending cephalad 

 toward the kidneys. 



a. Each branch consists of two parts, a larger, the CORNU or horn, 

 and a smaller, farther cephalad, the OVIDUCT or Fallopian tube. 



b. With the cat, dog, pig and many other mammals the young are developed in these 

 lateral portions, but in the human species development occurs normally in the mesal part 

 or "body" of the uterus, and the branches are relatively insignificant. 



32. The Ovary. Near the kidney is the OVARY, an oval, lobulated 

 body. Slit the uterus, pass the probe either way and endeavor to uncoil 

 the oviduct and find its orifice near the ovary. This is a difficult task and 

 hardly to be accomplished at an ordinary practicum. 



33. The Spermaduct. In the male, each ureter is crossed by a tube, 

 the SPERMADUCT or vas deferens. Traced in one direction it will be 

 found to enter the neck of the bladder farther caudad and nearer the 

 meson than the ureter; see Mivart, Fig. 115. In the other it will be 

 found attached to the TESTIS or testicle. As its name implies, the sperma- 

 duct is the correlative of the oviduct of the female, and serves to carry 

 to theeinittent organ the SEMEN (seminal liquid or sperm) for the fertili- 

 zation of the ovum. 



