40 LABORATORY OUTLINES FOR EMBRYOLOGY 



^ 



to the outside of the body. This is the urethra. With- 

 out removing any of the liver, examine it. Of how many 

 lobes is it composed? Size? Position? Dorsal to the 

 liver and a little posterior to it is the much coiled in- 

 testine. Dorsal to the bladder and ventral to the ureters 

 are two fine tubes, one on either side, which unite dorsal 

 to the posterior end of the bladder. These tubes are 

 the Fallopian tubes of the female. The posterior part 

 of the Fallopian tubes forms the horns of the uterus. 

 These unite to form the vagina. If the specimen is a 

 male the point of union of the remains of the Fallopian 

 tubes form the sinus p ocular is, or male uterus. The 

 sex ducts of the male are the vas deferens. Trace the 

 sex ducts until they open to the exterior. Near the an- 

 terior end of the sex ducts and a little ventral to them are 

 the sex glands, the ovaries if female, or the testes if male. 

 Dorsal to the sex glands and toward the median line of 

 the body are the remains of the Wolffian bodies. By 

 lifting the intestine and the posterior part of the liver, a 

 part of the comparatively large kidneys may be seen. 

 Trace the ureters to the kidneys. In the median line of 

 the body, extending between the sex ducts and posteriorly 

 dorsal to the urethra, is the posterior end of the intestine, 

 the descending colon and the rectum. 



Draw the dissection and label all the parts. 



Trace the umbilical vein through the liver by carefully 

 dissecting away a small part of the liver at a time. Im- 

 mediately dorsal to the anterior part of the liver is the 

 stomach. What is its shape? Position? The small 

 bladder found in the liver is the gall bladder. The duct 



