The house I live in or, Popular illustrations of the structure and functions of the human body, ed. by T.C. Girtin

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Longman Green, and Company, 1869 - Human physiology - 181 pages

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Page 160 - ... mechanism, and the delicacy of many of its parts, that it should always be liable to derangement, or that it would soon work itself out. Yet shall this wonderful machine go night and day, for eighty years together, at the rate of a hundred thousand strokes every twenty-four hours, having at every stroke a great resistance to overcome ; and shall continue this action for this length of time, without disorder and without weariness.
Page 1 - They consist often of the bark of a single tree, bent in the middle, and placed on its two ends in the ground, affording shelter to only one miserable tenant.
Page 160 - Consider what an affair this is, when we come to very large animals. The aorta of a whale is larger in the bore than the main pipe of the waterworks at London Bridge ; and the water roaring in its passage through that pipe is inferior, in impetus and velocity, to the blood gushing from the whale's heart.
Page xv - HOUSE I LIVE IN' is a curious building, one of the most curious in the world. Not that it is the largest, or the oldest, or the most beautiful, or the most costly; or that it has the greatest number of rooms, or that it is supplied with the most fashionable furniture.
Page 28 - ... forming a part of the prospective design to prepare an instrument fitted for the various uses of the human hand, than the manner in which the delicate and moving apparatus of the palm and fingers is guarded. The power with which the hand grasps, as when a sailor lays hold to raise his body in the rigging, would be too great for the texture of mere tendons, nerves, and vessels ; they would be crushed, were not every part that bears the pressure, defended with a cushion of fat, as elastic as that...
Page 160 - An anatomist, who understood the structure of the heart, might say beforehand that it would play; but he would expect, I think, from the complexity of its mechanism, and the delicacy of many of its parts, that it should always be liable to derangement, or that it would soon work itself out. Yet shall this wonderful machine go, night and day, for eighty years together, at the rate of a hundred thousand strokes every twenty-four hours, having, at every stroke, a great resistance to overcome ; and shall...
Page 159 - ... very large tubes, which return the blood back to the right ventricle of the heart. The blood is then propelled into the pulmonary artery, which disperses it through the lungs by innumerable small branches. It is there exposed to the action of the air, is afterwards received by the pulmonary veins, and by them is conveyed to the left auricle of the heart. This contracts, and sends it into the left ventricle, which, also contracting, pushes it into the aorta, whence it circulates through every...
Page 148 - ... and quantity of nourishment which it needs for its own support, and also for the support of that part of the body which is committed to its care. And although exceedingly minute and delicate, they are endowed by their Creator with the wonderful power of doing this, and also of abstaining from, or...
Page 160 - The wisdom of the Creator," saith Hamburgher, " is in nothing seen more gloriously than in the heart." And how well doth it execute its office ! An anatomist, who understood the structure of the heart, might say beforehand that it would play ; but he would expect, I think, from the complexity of its mechanism, and the delicacy of many of its parts, that it should always be liable to derangement...
Page 62 - It is also thought by many anatomists, that each fibre is made up of a great many smaller fibres, so small as not to be visible to the naked eye. The number of muscles in the human body is very great.

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