Leg Pain Symptoms & Signs. Related. Symptoms & Signs. Pain in the legs can occur as a result of conditions that affect bones, joints, muscles, tendons, ligaments, blood vessels, nerves, or skin. Leg pain can occur in the foot, ankle, knee, behind the knee, thigh, down the back of the leg, or in any part of the leg.
Taxonomy is the science of classifying and defining all organisms. This comes from Ancient Greek taxis (meaning arrangement) and nomia (meaning method). The way taxonomy goes is: domain #-># kingdom #-># phylum #-># class #-># order #-># family #-># genus #-># species.
Updated October 23, 2015. For centuries, the practice of naming and classifying living organisms into groups has been an integral part of the study of nature. Aristotle (384BC-322BC) developed the first known method of classifying organisms, grouping organisms by their means of transport such as air, land, and water.