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How Are the Arm and the Leg Adapted for Their Special Function?
Member rating: No Rating | Words: | Submitted: Mon Mar 15 2004
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How Are the Arm and the Leg Adapted for Their Special Function? Both the arm and the leg are adapted in a variety of ways to accommodate their special functions. The primary function of the lower limb is to support the weight of the body and to provide a stable foundation in standing, walking and running. Thus, in general it can be seen that in the lower limb, adaptation to stability takes precedence over adaptation to mobility. The upper limb is the organ of manual activity, and as such is a multijointed lever freely movable on the upper trunk at the shoulder joint. At the distal end of the upper limb is the important prehensile organ- the hand. Much of its importance is dependent on the adaptations that allow the pincer-like motion of the thumb. Much of the stability of the lower limb is attributable to the pelvic girdle. The body mass...
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