Human Body: A Text-book of Anatomy, Physiology and Hygiene

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Holt, 1898 - Physiology - 408 pages
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Page 268 - ... and is measured by observing the least distance which must separate two objects (as the blunted points of a pair of compasses) in order that they may be felt as two. The following table illustrates some of the differences observed: Tongue-tip l.lmm.
Page 263 - The ear (Fig. 136) consists of three portions, known respectively as the external ear, the middle ear, and the internal ear or labyrinth. The latter is the essential hearing organ since it contains the ends of the auditory nerve fibres.
Page 168 - The human heart lies with its apex touching the chest-wall between the fifth and sixth ribs on the left side of the breast-bone. At every beat a sort of tap known as the "cardiac impulse," or "apex beat," may be felt by placing the finger at that point.
Page 173 - Every inch of the arterial system may, in fact, be considered as converting a small fraction of the heart's jerk into a steady pressure, and when all these fractions are summed up together in the total length of the arterial system no trace of the jerk is left. As the effect of each . systole becomes diminished in the smaller vessels by the causes above mentioned, that of this constant pressure becomes more obvious, and gives rise to a steady passage of the fluid from the arteries towards the veins....
Page 324 - ... and whose brain was instantaneously evolved from the skull by the crash. The brain itself, entire, was before me within three minutes after death. It exhaled the odor of spirit most distinctly, and its membranes and minute structures were vascular in the extreme. It looked as if it had been recently injected with vermillion.

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