THE TRANSPORTING SYSTEM OF THE BODY 267 



7. Wind a string tightly about the finger in the direction of the finger 

 nail and with a clean needle draw a drop of blood from near the nail. 

 Examine with the microscope and note both red and white corpuscles. 



8. Take a living frog and, spreading its toes apart, examine the web be- 

 tween them with the microscope. Note the corpuscles moving through 

 the capillaries. 



9. Account for the red nose of the hard drinker. 



10. Why is one likely to feel sleepy after a hearty meal? 



11. Is a long walk before breakfast desirable? Why? 



12. Is a brisk walk before retiring desirable? Why? 



13. How does vigorous exercise aid in sending fresh supplies of blood 

 to the remote parts of the body? 



14. Why does the application of a hot water bag or a mustard plaster 

 to the skin cause it to become red? 



16. Why must the blood of a mechanic circulate faster than the blood 

 of a bookkeeper? 



16. Why do we need more covering when we lie down? 



17. How does tight clothing affect the circulation? 



18. Why may soaking the feet in hot water relieve a headache? 



19. How may rubbing the skin relieve an internal congestion? 



20. How may massage affect the circulation? 



