. Dr. Evans' How to keep well; . ining the ribbed chest wall. The anatomist cannot outline it well without his microscope. It is notnecessary to take the word of the anatomist for this. If you will try to stripoff the shiny lining of a chickens chest, or of a piece of rib pork, or of ribs ofbeef, you will find that this delicate layer is so thin that it will not strip. This pleura covers the lungs everywhere. Likewise it lines the chesteverywhere. It lines the bony part of the chest wall and also the muscularwall, called the diaphragm, which divides the great body cavity into two—theabdomen an
. Dr. Evans' How to keep well; . ining the ribbed chest wall. The anatomist cannot outline it well without his microscope. It is notnecessary to take the word of the anatomist for this. If you will try to stripoff the shiny lining of a chickens chest, or of a piece of rib pork, or of ribs ofbeef, you will find that this delicate layer is so thin that it will not strip. This pleura covers the lungs everywhere. Likewise it lines the chesteverywhere. It lines the bony part of the chest wall and also the muscularwall, called the diaphragm, which divides the great body cavity into two—theabdomen and the chest. In this little more than microscopic membrane, the pleura, are locatednerves, blood and lymph vessels. It is, in fact, provided with its own supplyof these, separate and apart from the supplies on the one hand to thelungs and on the other to the chest wall. The reason is that this pleura is a buffer as well as a ball-bearing. Can-cer, consumption, and other enemies cannot shoot straight across from the PLEURISY 65. skin to the lungs, or vice versa. They do get across sometimes, in time, butthey must stop at the pleural barriers and give the countersign. They mustcool their heels in the antechambers. Most of them give up in disgust. We may say then that the pleura has two jobs—the ball-bearing job andthe buffer job. I understand that cable, telegraph and telephone companies have instru-ments with which they can accurately locate trouble on the lines. A cableoperator can hitch an instrument on a cable line and tell that the trouble is2,037 miles out. A telephone operator can hitch in a locater and find out justwhere the trouble is located. The nerves are exact duplicates of cable, telegraph, and telephone ordinary nerves correspond to insulated cables;the sympathetic nerves to ordinary exposed unin-sulated wires. Some of the nerves are well trainedto local impulses; some of them are poorly trained. The best trained are in the palms of the handsand espec
Size: 1322px × 1890px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjecthygiene, booksubjectm
