. Kirkes' handbook of physiology . re. 3. Carbon-Monoxide Hemoglobin. Pass a stream of ordinary illumi-nating gas through the dilutions of hemoglobin. The carbon monoxideof the gas will form a compound with the hemoglobin, which now turns abright scarlet color. When examined with the spectroscope, the absorp-tion bands are found to be very similar to those of oxyhemoglobin. How-ever, map the spectrum to the scale as usual. Add the reducing agent,warm, and shake vigorously and re-examine. It is very difficult to break upthe combination of hemoglobin with carbon monoxide, hence the poisonousacti
. Kirkes' handbook of physiology . re. 3. Carbon-Monoxide Hemoglobin. Pass a stream of ordinary illumi-nating gas through the dilutions of hemoglobin. The carbon monoxideof the gas will form a compound with the hemoglobin, which now turns abright scarlet color. When examined with the spectroscope, the absorp-tion bands are found to be very similar to those of oxyhemoglobin. How-ever, map the spectrum to the scale as usual. Add the reducing agent,warm, and shake vigorously and re-examine. It is very difficult to break upthe combination of hemoglobin with carbon monoxide, hence the poisonousaction of this gas. CHAPTER V THE CIRCULATION OF THE BLOOD The blood is contained in a system of closed vessels through which it iskept in circulation during the life of an individual. The energy to keep upthis motion is supplied by the heart, which is a large muscular organ con-sisting of four great divisions, the right and left auricles and right and leftventricles. The right ventricle discharges its blood into the pulmonary artery,. Fig. 133.—Diagram of the Circulation in an Animal with a Completely Separated Rightand Left Ventricle and a Double Circulation. (After Huxley.) Ad, Right auricle receiving thesuperior and inferior vena? cava, Vcs and Vci; Dth, thoracic duct, the main trunk of the lymphaticsystem; Ad, right auricle; Vd, right ventricle; Ap, pulmonary artery; P, lung; Vp, pulmonaryvein; As, left auricle; Vs, left ventricle; Ao, aorta; D, intestine; L, liver; Vp, portal vein; Lv,hepatic vein. through which it passes to the lungs, returning through the pulmonary veins tothe left auricle, and into the ventricle. From the left ventricle the blood ispumped into the great aorta, and through its branches distributed to the entirebody. The terminal arteries are continuous with the general capillaries of the 141 142 THE CIRCULATION OF THE BLOOD body, and these in turn with the veins, which conduct the blood back to theright side of the heart again. It will be seen, therefore,
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