DIGESTION 



143 



LYMPHATIC 

 SYSTEM 



Lacteals 



Other 

 Lymphatics 



Glands . . . 



The lymphatics of the intestines. 

 Many originate in the villi of the small 

 intestine. 



(During digestion a. milky fluid 

 Contain] (chyle). 



{During fasting a watery fluid. 

 I Absorb fatty substances. 

 f Absorb the fluid portion of blood (lymph) 

 which has exuded through the blood- 

 1 vessels. 



( Also other substances for reorganization. 

 ( Engaged in elaborating blood from the 

 "l lymph and chyle. 

 ( In front of backbone, chiefly in thorax. 



Eeceptaculum chyli lower portion situ- 

 Thoracic duct ] ated in the abdomen. 



I Receives lymph and chyle, and pours them 

 I into the blood system. 



QUESTIONS FOR TOPICAL REVIEW 



PAGE 



1. What do you understand by nutrition ? 115 



2. How is the process of nutrition carried on ? 115 



3. What further can you state on the subject ? 115 



4. Describe the general plan of digestion 116 



5. How is the process of mastication carried on ? 116 



6. State what you can in relation to the formation of the teeth 117, 118 



7. What, in relation to their arrangement ? 117, 118 



8. What, in relation to the process of " shedding " ? 117 



9. In relation to the different forms of teeth in different animals?.. .119, 120 



10. What causes operate to injure or destroy the teeth ? 120 



11. What suggestions and directions are given for the preservation of 



the teeth ? 120, 121 



12. What do you understand by insalivation ? 121 



13. How is the process of insalivation carried on ? 121, 122 



14. Of what importance is the saliva to the process ? 122, 123 



15. Of what importance are mastication and insalivation ? 124 



16. Describe the consequences of rapid eating 124, 125 



17. What becomes of the food directly after it has undergone mastica- 



tion and insalivation ? 125 



18. Describe the location and formation of the stomach 125, 126 



19. Describe the process by which the gastric juice is formed 126, 127 



20. What are the properties and uses of the gastric juice ? 127 



21. What are the movements of the stomach, and what their uses ? 128 



22. What further can you state on the subject ? 128 



23. What portions of the food are digested in the stomach? 129, 130 



24. What are the first changes of digestion ? 12!) 



25. What further can you state in relation to the stomach ? 129, 130 



26. Describe the intestines 131 



27. Describe the process of intestinal digestion 131, 132 



28. What do you understand by absorption ? 133 



