How does your skeletal, muscular, circulatory, endocrine, and nervous systems work together to make you react to a burn

They all work in different ways but they all work together. For example, the Skeletal and muscular system will help you move away from danger or fire. Although, the nervous system sends messages to the brain that there is danger or fire. 

True statement gravity force is more on bigger mass, less on smaller mass.all mass fall on planet with same acceleration and speeds