. A system of anatomy for the use of students of medicine (Volume 1). ody. The heart is preserved in its position, 1st, by the venae cavre 460 RIGHT AURICLE. which are connected to all the parts to which they are contigu-ous in their course; 2d, by the vessels which pass between itand the lungs, which are retained in a particular position by themediastinum; 3d, by the aorta, which is attached to the medias-tinum in its course downwards, after making its great curve;and 4th, by the pericardium, which is attached to the greatvessels and to the mediastinum. By these different modes thebasis of th
. A system of anatomy for the use of students of medicine (Volume 1). ody. The heart is preserved in its position, 1st, by the venae cavre 460 RIGHT AURICLE. which are connected to all the parts to which they are contigu-ous in their course; 2d, by the vessels which pass between itand the lungs, which are retained in a particular position by themediastinum; 3d, by the aorta, which is attached to the medias-tinum in its course downwards, after making its great curve;and 4th, by the pericardium, which is attached to the greatvessels and to the mediastinum. By these different modes thebasis of the heart is fixed, while its body and apex are perfectlyfree from attachment, and only contiguous to the pericardium. The external surface of the heart, being formed by the serouslayer of the pericardium, is very smooth: under this surface alarge quantity of fat is often found. The two auricles are contiguous to each other at the base, andare separated by a partition which is common to both. The Right Auricle originates from the junction of the two Fig. 39.*ft ~h ft. vense cavse. These veins areunited at some distance behindthe right ventricle,f and are di-lated anteriorly into a sac orpouch, which is called the Sinus,and extends to the right ventricle,to which it is The upper part of this pouch,or sinus, forms a point with in-dented edges, which is detachedfrom the ventricle, but lies looseon the right side of the point has some resem-blance to the ear of a dog, from * Fig. 39.—Longitudinal section of the heart, showing its cavities, b, Rightventricle, c, Septum ventriculorum. d, Right auricle, e, left auricle. /, Sec-tion of the mitral valves, g, Section of tricuspid valves. A, Arch of aorta. A, de-scending aorta, i, i, Vena cava superior and inferior, k, k, Right and leftbranches of the pulmonary artery. I, I, Pulmonary veins. t In this description the heart is supposed to be in its natural position. X At the place of junction of these veins there is a p
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Keywords: ., bookcentury1800, bookid101532043x1nlmnihgov, booksubjectanatomy
