Arteries - Thick walled blood vessels, Veins - Thin elastic walls, Function of the nail - To protect the end of the finger from damage, Voluntary muscle - Type of muscle in the lower arm, Function of bones - To produce red and white blood cells and provide a framework, Function of muscles - For movement and to produce heat, Two muscles groups of the lower arm - Extensors and flexors, Blood vessels of the lower leg - Peroneal and Tibial, Blood vessels of the lower arm - Radial and ulna,

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