174 ELEMENTS OF MAMMALIAN ANATOMY. 
within the abdomen. In Primates and some Edentates, the 
uterus is merely a pear-shaped body without any cornua, 
the Fallopian tubes leading directly into the body of the 
uterus. 
In the ox, bears, seals, and cetaceans the kidneys are 
distinctly lobulated. Internal evidence of lobulation is pre- 
sented in most mammals by the renal papille. In the 
embryo, the kidneys of all mammals are lobulated. 
PRACTICAL QUESTIONS AND SUGGESTIONS. 
1. What other waste products besides COz result from the chemical 
action in the tissues of the body? 
2. Write a description of all parts of the urinary system visible in 
your dissection. 
3. Bisect a kidney longitudinally in the horizontal plane, draw the 
cut surface, and label all features. 
4. Explain the parts of a uriniferous tubule. 
5. Wherein does the male urinary system differ from the female? 
6. Make a drawing of the Fallopian tubes and uterus and label all 
parts. 
7. Describe location, size, external appearance, etc., of the ovary as 
seen in your specimen. 
8. How are the female reproductive organs held in place? 
g. Can you distinguish externally the termination of the uterus and 
the beginning of the vagina? 
to. Are there any eggs protruding from the ovary or any cavities 
from which eggs have been recently discharged? 
11. Describe a Graafian follicle. 
12. What must be added to the ovum to produce another animal? 
13. Name the parts of the male reproductive system present in your 
specimen and locate them. 
14. Describe the course of the spermatozoon from the testis to the 
exterior. 
15. Do all mammals nourish their young in the same manner? 
16. What mammals incubate their eggs externally? 
