As we read above that the arthropods have jointed legs. These legs or appendages help them to have good mobility. As and when the legs are joined, then they serve the purpose of providing the movement in multiple directions. So, this gives them an edge to perform various activities, without much effort. The Chilopoda is one of the classes in which the arthropods are divided. They have the presence of many legs and their body is long and segmented. Excretion occurs with the help of Malpighian tubules and respirations occur by the trachea. Direct type of development is present in these organisms.