Just as the organs in an organ system work together to accomplish their task, so the different organ systems also cooperate to keep the body running. For example, the respiratory system and the circulatory system work closely together to deliver oxygen to cells and to get rid of the carbon dioxide the cells produce.
Growth is the right answer, because ecdysis or moulting term is associated with shedding of exoskeleton . Snakes do so to increase in size and for development
