Word: chests
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Dates: during 1880-1889
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...principal agent in drawing air into the lungs. The enlargement of the pleura forces the air out of the air cells, thin walls are brought into contact with each other, and the whole lung in an airless condition may be pressed into the back part of the chest alongside of the back bone, where it lies as useless, as far as breathing is concerned, as a strip of leather. The same results may follow from the destruction of the elastic fibre of the lung, which takes such an active share in driving out the air expiration. Impurities...
...certain amount, however, always remains. As the heart is enclosed in a sort of sack called the pericardium, so are the lungs enclosed in a sack, the pleura, the inner part of which passes over the outside of the lungs and the outer part lines the inside of the chest. In health there is nothing between these two surfaces but a little moisture which helps them to slip easily on each other; a matter of importance, as the lungs have to keep in constant motion and follow the rising and falling of the ribs. If this sack becomes inflamed...
...ordinary easy breathing most of the work is done by the action of the diaphragm, a large muscle which separates the abdomen from the chest. It is fastened to the ribs and the back bone and it arches upward; when it contracts it flattens, and by pulling on the base of the chest, makes it larger. This enlargement of the chest is also performed by little muscles between intercostals. They raise the ribs from their oblique position. In ordinary healthy respiration the current of air passes in and out of the lungs through the nose, not through the mouth...
...time, so there are placed in its walls rings of cartilage which are incomplete in some part of their circumference. The epiglottis, fastened to the back part of the tongue keeps food from falling into the windpipe when we are eating. After the windpipe has gone down into the chest it divides into two parts, and goes to the right and left sides. Each of these enters the lung on its own side, and then splits up into a number of smaller branches. The smallest bronchial tubes at last end in little sacs which are air cells. The walls between...
...often that we have any criticism to make on the excellent arrangement of the apparatus in the gymnasium, but we would call the attention of the powers that rule to the condition of the handles of the new chest-weights. A small iron pin passes through the wooden handles, and, as the pin is not securely fastened, the handle frequently flies off, greatly to the surprise of the man exercising and to the detriment of the apparatus. It is very difficult to replace the pin, and consequently several pieces of apparatus are chronically out of order. We hope the needful...