IN HYGIENIC PHYSIOLOGY. 181 



24. What ivould you do if you had taken, arsenic by 



mistake ? 



(See Physiology, p. 265.) 



25. Why should ham and sausage be thoroughly 

 cooked ? 



The trichina, which frequents pork, is only destroyed at a 

 high temperature. 



26. Why do ive wish butter on fisJi, eggs with tapioca, 

 oil on salad, and milk with rice ? 



To supply the elements of food lacking in the composition 

 of fish, tapioca, etc. 



27. Explain the relation of food to exercise. 



Their relation is exceedingly intimate. If we eat much we 

 should take more exercise, and if, on the contrary, we labor 

 more, we desire additional food. Violent exercise, directly after 

 a hearty meal, is injurious ; but a gentle, quiet half-hour's 

 saunter will greatly benefit the digestion. 



28. How do you explain the difference in the manner 

 of eating between carnivorous and herbivorous animals ? 



Meat requires less saliva to aid in its digestion, and hence 

 it is mainly digested in the stomach ; while vegetable food 

 needs to be thoroughly masticated and incorporated with the 



salivary mucus. 



i 



29. Why is a child's face plump and an old man's 

 wrinkled ? 



In the child the processes of nutrition are more active than 

 those of waste. The reverse is the case in old age. 



30. Shoiv how life depends on repair and waste. 



(See Popular Chemistry, p. 19, et seq. ; and Physiology, p. 122.) 



31. What is the difference between the decay of the 

 teeth and the constant decay of the body ? 



The particles of the teeth lost by decay are not renewed, 

 while in the body they are replaced as fast as worn out. The 



