Without bones we wouldn't be able to stand upright. The respiratory system is important because it provides oxygen to our body's cells. Without oxygen, we would not be able to survive. Exercise is very good for our body systems. It exercises our heart, which strengthens it.
Exercise is also very good for reducing stress.
Stress can cause many digestive, heart, and nervous problems. Eating good foods is very important to our body systems. In order for our body systems to work properly, they need nutrients. We need to follow the food pyramid to fulfill our body's nutrient requirements. Getting the proper amount of sleep is very important to our body systems.