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.
The digestive system is very important to all the other systems. It provides nutrients for the cells of all other systems in our body to work. The respiratory system is very important to the circulatory system. Blood is pumped from the heart to the lungs. The lungs oxygenate the blood, then the oxygenated blood is carried throughout the body.