404 APPLIED PHYSIOLOGY 



round blood ceils upon its surface, and that in the deeper layers the 

 cells grow larger and become branched. Explain that the deeper layers 

 are the older and that their cells are white blood cells which are grow- 

 ing to become connective tissue. 



REVIEW TOPICS 



1. Explain in order what happens in an injured part ot 



the body, describing the increased flow of blood, 

 and the action of the white blood cells. 



2. Explain the healing of a cut. 



3. Explain how a raw spot of skin becomes healed, and 



what part the epithelium takes in the process. 



4. Explain how bacteria in an injured part retard healing. 



5. Explain how white blood cells overcome the bacteria. 



6. Explain the formation of an abscess. 



7. Explain taking cold in a wound, and in a mucous 



membrane. 



8. Give the signs of inflammation and its use. 



9. Tell what composes the matter discharged from an 



abscess and from the nose and throat during a cold. 



10. Show how to treat a wound in which one has taken 



cold. 



11. Explain how to treat a cold of the air passages. 



