Human physiology : designed for colleges and the higher classes in schools and for general reading . t same remarks could be made in regard to the pulmonaryveins, that pour their contents into the left auricle. 123. Having thus examined the heart in detail, you are nowprepared to look at it as a whole. For this purpose, I presentto you, in Fig. 31, a front view of the heart, in which a is theright auricle, receiving the purple blood from the whole bodyby the two large veins, h and i, called the vence cavce ; b is theright ventricle, that receives the blood from the right auricle,and sen
Human physiology : designed for colleges and the higher classes in schools and for general reading . t same remarks could be made in regard to the pulmonaryveins, that pour their contents into the left auricle. 123. Having thus examined the heart in detail, you are nowprepared to look at it as a whole. For this purpose, I presentto you, in Fig. 31, a front view of the heart, in which a is theright auricle, receiving the purple blood from the whole bodyby the two large veins, h and i, called the vence cavce ; b is theright ventricle, that receives the blood from the right auricle,and sends it to the lungs by the pulmonary artery, f; c is theleft auricle, which receives the red blood from the lungs, bythe pulmonary veins, g, g, g; d is the left ventricle that re-ceives the blood from the left auricle, and sends it all over thebody through the aorta, e. You observe, that you see but apart of the left auricle and ventricle, they lying partly behindthe right ventricle. You do not see the very beginning of the 80 HUMAN PHYSIOLOGY. General view of nil the parte of the heart. FIG. FRONT VIEW OF THE HEART. aorta, for, as it rises from the left ventricle it is at first con-cealed behind the top of the right ventricle and the beginningof the pulmonary artery. It then forms an arch, from whichit sends forth branches to the head and upper extremities; andit afterwards passes down behind the heart, to supply with itsbranches the trunk of the body and the lower extremities. Inthe line of division between the two ventricles, 6 and d, yousee one of the coronary arteries, as they are called, which,coming from the beginning of the aorta, as described in § 120,supply the walls of the heart with blood. 124. To make you quite familiar with the relations of thedifferent parts of this complicated organ, and with the courseof the blood through its different apartments, I give you, in THE CIRCULATION. 81 Course of the blood through the different cavities of the heart. Fig. 32, a
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