-For each type of drugs affect the body's systems, making those systems perform abnormally, so to avoid substance abuse and find ways to protect themselves from substance abuse.
- Substance abuse affects each system of the body, making those systems dysfunction. So avoid using drugs. And find ways to protect themselves from substance abuse.
- substance abuse each type affecting various body systems, those systems do wrong. So to avoid using drugs. And find the way to protect themselves from the drug.