. Cunningham's Text-book of anatomy. Anatomy. 1088 THE EESPIEATOEY SYSTEM. sternal reflection-line passes into the right diaphragmatic reflection-line. Opposite the sternal attachment of the fourth costal cartilage the reflection-line of the left pleura deviates laterally, and is continued downwards at a variable distance from the right pleura. A small triangular area of pericardium is thus left uncovered by pleura, and therefore in direct contact with the ventral chest-wall. Leaving the sternum, the re- flection-line of the left pleura passes downwards, parallel and close to the left margin o
. Cunningham's Text-book of anatomy. Anatomy. 1088 THE EESPIEATOEY SYSTEM. sternal reflection-line passes into the right diaphragmatic reflection-line. Opposite the sternal attachment of the fourth costal cartilage the reflection-line of the left pleura deviates laterally, and is continued downwards at a variable distance from the right pleura. A small triangular area of pericardium is thus left uncovered by pleura, and therefore in direct contact with the ventral chest-wall. Leaving the sternum, the re- flection-line of the left pleura passes downwards, parallel and close to the left margin of the sternum, dorsal to the fourth intercostal space, the fifth costal cartilage and the fifth intercostal space, to the sixth costal cartilage. Here it turns later- ally and downwards, and passes into the diaphragmatic re- flection-line of the left side. From the back of the sternum the right pleura is re- flected, in the supe- rior part of the chest, on to the re- mains of the thymus, the right innominate vein and the vena cava superior, and, inferior to this, directly on to the ventral aspect of the pericardium. The left pleurals reflected from the back of the manubrium sterni on to the left innomin- ate vein and the aortic arch, and, in- ferior to this, directly on to the ventral side of the pericardium. The diaphragm- atic line of reflection is that along which the pleura leaves the thoracic wall and is reflected on to the thoracic surface of the diaphragm. This reflection takes place along a curved line, which, except as it approaches the ver- tebral column, is placed a short dis- tance above the in- ferior border of the thoracic wall. It differs somewhat on the two sides of the body. On the left side the diaphragmatic line of reflection proceeds downwards along the ascending part of the sixth costal cartilage, crosses the ventral end of the sixth intercostal space and the descending part of the cartilage of the seventh rib (Fig. 865). Still con- tinuing to pass downward
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1914
