Physiological principle of elasticity or Hooke's law, what establishes and what is it used for?

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This video describes the principle of elasticity that is based on Hooke's Law and that establishes that elastic bodies such as tissues rich in collagen and elastin have the ability to store elastic potential energy when deformed and deliver it as elastic kinetic energy when returning to its normal position of rest by means of elastic recoil. In addition, the most common applications are described. One of them is the elasticity of the aorta, which accumulates potential energy during ventricular systole (in the phases of rapid and slow ejection) and delivers it as kinetic energy during ventricular diastole. The latter makes it possible to transform the intermittent (or discontinuous) flow of the heart into a continuous flow at the level of the capillaries. Another application is the Starling mechanism of the heart, which establishes that ventricular filling through venous return determines cardiac output or cardiac minute volume. That is to say, the more the ventricular chambers are filled, the more the cardiac fibers are stressed (more stretched) and due to elastic recoil, they contract with more force and push more blood. In addition to this passive elastic recoil, the Starling mechanism depends on stretch-activated receptors (mechanoreceptors) that induce a contraction of the muscle fibers of the ventricles and, therefore, favor emptying. Another application is that of the pulmonary retraction force, which explains the tendency of the lungs to collapse and which allows expiration at rest to be passive (without energy expenditure). Another example is that of tendons in locomotion that behave like expansion springs during the braking phase in support (they accumulate elastic potential energy) and that retract elastically during the propulsion phase (deliver elastic kinetic energy). It should be noted that the efficiency of the tendons (approximately 93%) is highly superior to that of the muscles (approximately 25%). Finally, the nuchal ligament allows the head of quadrupeds to be kept in its normal position relative to the horizontal (to the ground) without wasting energy.

[@albertomalave5389]

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[@mauriciogiuliodori]

Gracias por comentar Alberto!!! Saludos

[@wilfredomatson4386]

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[@mauriciogiuliodori]

Gracias Wilfredo!!!