Elephants are called pachyderms, which means thick-skinned animals. An elephant’s skin is extremely tough around most parts of its body and measures about 2.5 centimetres thick. However, the skin around the mouth and inside of the ear is paper thin. Normally, the skin of an Asian is covered with more hair than its African counterpart.
An elephant’s legs are great straight pillars, as they must be to support its bulk. The elephant needs less muscular power to stand because of its straight legs and large pad-like feet. For this reason an elephant can stand for very long periods of time without tiring. In fact, African elephants rarely lie down unless they are sick or wounded. Indian elephants, in contrast, lie down frequently.(Wikipedia.org)