Human physiology (Volume 2) . er the interior paries of the half of the thorax to whichit belongs; lining the ribs and intercostal muscles, and coveringthe convex or upper surface of the diaphragm. There are, con-sequently, two pleurae, each of which is confined to its own half of the thorax, lining its cavity and cover-ing the lung. Behind the sternum,however, they are contiguous to eachother, and form the partition, calledmediastinum, which extends betweenthe sternum and spine*. In Fig. 148,the dotted lines exhibit the boundariesof the two cavities of the pleura, andthe middle space between
Human physiology (Volume 2) . er the interior paries of the half of the thorax to whichit belongs; lining the ribs and intercostal muscles, and coveringthe convex or upper surface of the diaphragm. There are, con-sequently, two pleurae, each of which is confined to its own half of the thorax, lining its cavity and cover-ing the lung. Behind the sternum,however, they are contiguous to eachother, and form the partition, calledmediastinum, which extends betweenthe sternum and spine*. In Fig. 148,the dotted lines exhibit the boundariesof the two cavities of the pleura, andthe middle space between is the me-diastinum. Within this septum, theheart, enveloped by the pericardium,is situate, and separates the pleura?considerably from each other. Ana-tomists generally subdivide the me-diastinum into two regions ; one pass-ing from the front of the pericardium to the sternum, called theanterior mediastinum ; the other, from the posterior surface ofthe pericardium to the dorsal vertebras, — the posterior mediasti- Fig. Reflections of the Pleura. RESPIRATORY ORGANS. 21 Fig. 149.
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectphysiology, bookyear1
