RESPIRATION AND EXCRETION 307 



2. Do you find any elevations of the dermis that extend into the epi- 

 dermis ? Describe one. 



3. Note some coiled tubes (sweat glands) which lead to the surface of 

 the skin. Do they seem to correspond in location with the openings seen 

 with the hand lens ? Note. The instructor may well here call attention 

 to the hairs and oil glands. 



Conclusions. 1. Where is the perspiration formed (secreted') ? 



2. What is one of its functions ? 



3. Is the skin a sense organ ? Explain. 



4. Write a summary of the main functions of the skin. 



5. Tell something of the structure of the skin. 



Questions 



1. Why should much water be drunk daily ? 



2. When do you perspire the most ? 



3. Why should the skin be kept clean ? 



4. What is the chief physiological use of clothing ? 



5. Why is it necessary to bathe frequently ? 



6. How does a corn differ from a blister ? 



7. What effect have rubber shoes on the feet ? 



8. How should you treat burns ? 



9. State facts that show the skin gives off wastes. 



10. Explain the function of perspiration. 



11. Why is heat more oppressive in moist weather ? 



12. What is the temperature of the healthy body ? 



13. What may cause baldness ? 



14. What is the cause and what the cure for dandruff ? 



15. What is the relation of bodily heat to work performed ? 



16. How treat cuts ? 



17. Why should most people take a moderately cold bath 

 daily ? 



18. What is the effect of alcohol on the bodily heat ? 



19. What is the use of a hot bath ? Cold bath ? 



20. What care should be observed when swimming ? 



21. Why is ammonia used in refrigerators or in cooling ? 



22. Why never employ a doctor advertising to cure 

 cancer ? 



