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THE VASCULAR SYSTEM AND THE CIRCULATION.

Pp. 21–57.

action.

15. Movements of the chest walls. The intercostal muscles.

16. The diaphragm.

17. Actions of the diaphragm and intercostal muscles compared.

18. Accessory muscles.

19. Sighing, coughing, &c.

20. The chest compared to a bellows. Residual, supplemental,

complemental, tidal, and stationary air.

21. The stationary air plays the part of a middle man.

22. Composition of stationary air.

23. The respiratory mechanism under the control of the nervous

system.

24, 25. Respiration and circulation compared.

26. The respiratory murmurs.

27. Inspiration assists the circulation.

28, 29. Effect of expiration on the circulation. Stoppage of the

heart by distension of the lungs.

30. The activity of the respiratory process modified by the

circumstances of life.

31. Asphyxia.

32. Respiratory poisons.

33. Slow asphyxiation.

34. Necessity for an abundance of fresh air.

LESSON V.

THE SOURCES OF LOSS AND OF GAIN TO THE BLOOD.

Pp. 101–132.

§ 1. Distribution of arterial blood.

2—4. The blood in various ways meets with constant or in-

termittent gains and losses of material and heat.

5. Tabular view of the sources of loss and gain.

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