Life Cycle of a Maggot

Maggots are mostly known as disgusting creatures who roam around dirty places. Although you might see them as infectiousness bugs, it's been told by scientist that Maggots can actually heal you're wounds. They eat all the dead tissue inside you're wound and leave only the healthy and alive ones. Some Maggots on the other hand are quite infectiousness and could cause disease. As you can see on the bottom of this paragraph, I've made a diagram about the Life Cycle of Maggots.