La Espalda

musculos de la espalda

musculos de la espalda

    Básicamente, la espalda cumple tres funciones:

· Sostener el cuerpo y permitir su movimiento.

· Contribuir a mantener estable el centro de gravedad, tanto en reposo como en movimiento.

· Proteger la médula espinal envuelta en hueso.

Para poder sostener el peso del cuerpo, la espalda debe estar compuesta por huesos muy resistentes y músculos potentes; sin embargo, también tiene que ser flexible, con el objetivo de permitir un gran número de movimientos. Por eso no está compuesta por un gran hueso sino por 33 vértebras separadas, dispuestas una encima de otra y sostenidas por un sistema de músculos (los cuales actúan como contrapeso que compensa el resto de movimientos del cuerpo) y ligamentos (que ofrecen estabilidad a todo el conjunto de esta estructura).

Para proteger la médula espinal, las vértebras tienen una forma especial; un agujero en su centro por el que discurre la médula.

columna vertebral

columna vertebral

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