160 OUR BODIES AND HOW WE LIVE 



QUESTIONS ON THE TEXT 



I. What are the two general uses of the blood? 2. State in a 

 general way where the blood vessels are found. 3. Give some of the 

 properties of blood. 4. Of what does blood consist, and why does 

 it look red? 5. What simple experiment will illustrate in a general 

 way why the blood seems uniformly red ? 6. Describe the red cor- 

 puscles. 7. Of what use are the red corpuscles ? 8. Describe the 

 white corpuscles. 9. State briefly the use of the white corpuscles. 

 10. How does blood look when examined with the microscope ? 



II. What happens if blood is allowed to stand for a short time? 

 12. What is meant by the coagulation of the blood ? 13. Describe 

 the serum of the blood. 14. Of what is the clot composed ? 15. Why 

 is the clotting of blood important ? 16. Describe briefly the apparatus 

 concerned in the circulation of blood. 17. How may the blood cir- 

 culation be compared to the water service of a city? 18. Describe 

 the heart. 19. What is the pericardium ? 20. In what simple way 

 may the position of the pericardium be shown ? 



21. Describe the chambers, or cavities, of the heart. 22. What are 

 the valves of the heart? 23. Describe the action of the various 

 valves. 24. What can be said of the work done by the heart? 

 25. What is the aorta? 26. Describe the pulmonary veins. 27. Describe 

 the pulmonary artery. 28. What are the two largest veins of the 

 body, and what is their action? 29. Mention some of the main 

 branches of the aorta. 30. What are veins? 



31. What simple experiment will illustrate the action of the veins? 

 32. What are capillaries ? 33. What interchange takes place between 

 the blood and the lymph ? 34. Into what two parts may the course 

 of the circulation be subdivided ? 35. Describe the pulmo'nary circu- 

 lation. 36. Describe the systemic circulation. 37. What is meant 

 by the portal circulation ? 38. What is the beat, or impulse, of the 

 heart? 39. What are the two sounds of the heart? 40. What is 

 the pulse, and what may it indicate to the doctor? 



41. How does alcohol get into the blood? 42. What is the effect 

 of alcohol upon the blood vessels? 43. What is the effect of alco- 

 holic excess upon the heart ? 44. How does tobacco affect the heart? 

 45. Describe the so-called " tobacco heart." 



