1. And how they affect the nervous system
Drugs
And how they affect the nervous system

2. Marijuana
marijuana acts on the brain's reward system, which is made up of regions that govern the response to pleasurable things.

3. marijuana
Effects of marijuana: The effects from smoking marijuana are felt as soon as the THC enters the bloodstream and last from 1-3 hours. Absorption of THC is slower if marijuana is ingested, typically producing effects 30 minutes to an hour after exposure and lasting up to 4 hours.

4. Marijuana
Marijuana increases the heart rate, relaxes and enlarges bronchial passages, and dilates the blood vessels in the eyes, which may cause them to appear bloodshot.

5. How marijuana effects the body

6. Magic Mushroom
Magic mushrooms cause your mind to go on a "trip" that can be good or bad, but is impossible to stop..

7. Magic mushroom
They distort your perception of reality and can cause you to do things that will harm yourself or people around you. They also can cause nausea, tension in the neck muscles and dilated pupils.

8. Speed
Effects of speed: using speed targets the brains ‘reward system’. People that use speed usually crave the drug which causes an addiction.

9. Speed
Speed enhances your alertness and energy and also speeds up the messages between the brain and the body. This leads to an increased heart rate and breathing rate and higher blood pressure.

10. Effects of speed

11. Bibliography