طب بشري جامعة سبها-دفعة2002
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Flattened muscle are attached by thick but strong sheet of fibers called an aponeurosis
It form well difined layer and determine the path taken by pathogenic organisms
The arrector pili is a band of smoth muscle innervated by parasympathetic nerve fibres
The follicles lie vertical to the skin surface and their expanded extremities called hair bulbs
