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 papillae. In the 

 embryo, the kidneys of all mammals are lobulated. 



PRACTICAL QUESTIONS AND SUGGESTIONS. 



1. What other waste products besides CO 2 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? 



9. Can you distinguish externally the termination of the uterus and 

 the beginning of the vagina? 



10. Are there any eggs protruding from the ovary or any cavities 

 from which eggs have been recently discharged? 

 n. 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? 



