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. This allows our brain, heart, and other systems the chance to rejuvenate. Smoking is bad for our respiratory system.
Alcohol is also bad for the body.
It can damage our liver which is needed to filter toxins out of our body. Drugs can have devastating effects on all of our body systems. Drugs affect the nervous system and can damage the heart and lungs.