Get Biomechanics: Circulation PDF

By Y.C. Fung

ISBN-10: 1441928421

ISBN-13: 9781441928429

ISBN-10: 1475726961

ISBN-13: 9781475726961

The conception of blood movement is the oldest and such a lot complicated department of biomechanics, with roots extending again to Huangti and Aristotle, and with contributions from Galileo, Santori, Descartes, Borelli, Harvey, Euler, Hales, Poiseuille, Helmholtz, and so on. It represents a tremendous a part of humanity's suggestion of itself. This e-book provides chosen issues of this nice physique of principles from a historic viewpoint, binding vital experiments including mathematical threads. The goals and scope of this e-book stay kind of like within the first version: to give a remedy of circulatory biomechanics from the stand­ issues of engineering, body structure, and clinical technological know-how, and to improve the topic via a series of difficulties and examples. The identify is modified from Biodynamics: circulate to Biomechanics: flow to unify the e-book with its sister volumes, Biomechanics: Mechanical homes of residing Tissues, and Biomechanics: movement, circulation, tension, and progress. the key alterations made within the re-creation are the subsequent: whilst the 1st variation went to press in 1984, the query of residual rigidity within the middle was once raised for the 1st time, and the lung was once the one organ analyzed at the foundation of strong morphologic info and constitutive equations. The distinct research of blood movement within the lung have been performed, however the physiological validation experiments had no longer but been completed.

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14) For the blood flow problem, usually some of the terms may be neglected. The heat input is often small. The deformation of the vessel wall may be so small that both the work done by the wall force and the kinetic energy crossing the vessel wall are negligible. Then the third and fourth terms on the left-hand side of the equation and the third term on the right can be omitted, and the gravitational potential term is simplified into (pghz-pgh 1) times the flow rate, with h 1 and h 2 being the heights of stations 1 and 2, respectively.

Plenum Press, New York. 1 Introduction The heart is the prime mover of blood. By periodic stimulation of its muscles it contracts periodically and pumps blood throughout the body. How the pump works is the subject of this chapter. In each cycle the left and right ventricles are first filled with blood from the left and right atria, respectively, in the diastolic phase of the cycle. Then by the deceleration of the blood stream a pressure field is generated, which closes the valves between the atria and the ventricles.

Fahraeus measured the pressures in the carotid or femoral artery in corpses at least 24 hours after death and found them to be negative, varying from a few millimeters to 1 em Hg below the atmospheric pressure. If one begins an autopsy and opens the thoracic cage at that time, the pressure rises to zero by sucking air into the arteries. Fahraeus believes that the negative pressure arises due to dilation of the arterial system. He reasoned that this dilation cannot take place in the large arteries; it must therefore be the little arteries that dilate and draw a certain amount of blood from the large arteries.

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Biomechanics: Circulation by Y.C. Fung

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