Snakes are scaly, cold-blooded, carnivorous reptiles related to lizards. They tend to be limbless and move by muscular contraction. Though they have razor-sharp teeth, they do not chew their prey but instead swallow it whole with the help of a loosely attached jaw. Because their bodies are tubular, some paired organs must be staggered within the body, and one of the two lungs is generally non-functional and sometimes even absent. Why are snakes associated with healing and medicine? Discuss