All of your body systems have to work together to keep you healthy. Your bones and muscles work together to support and move your body. Your respiratory system takes in oxygen from the air. It also gets rid of carbon dioxide. Your digestive system absorbs water and nutrients from the food you eat.
The respiratory system connects with the muscular system by bringing nutrients, and oxygen to your muscles. The oxygen and nutrients gets to your muscles through blood. This is why when you run and breath heavier, your pulse is faster. But all systems work together to maintain homeostasis, not just respiratory and muscular.
