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. Our cells cannot function without oxygen.