Bhang and Ganja are 

Concept:

• Addiction is the state of being given up on some habit, drug, alcohol, tobacco, etc.
• Addiction is of three types- Drug abuse, Tobacco addiction, and Alcohol addiction.
• Drug abuse is taking drugs for a purpose except for clinical use.
  • Drug abusers are likely to require drugs again and again.
  • Drugs alter perception, behaviour and consciousness.

Explanation:

• Cannabis sativa is commonly known as Hemp or Bhang plant.
• Cannabinoids are a group of chemicals that are obtained from the inflorescences of the Cannabis plant.
• Hashish, charas, ganja, and bhang are the different cannabis preparations.
• Generally taken by inhalation and oral ingestion, these are known for their effects on the cardiovascular system of the body.
• Ganja is prepared from the buds, twigs, stems, and leaves of the hemp plant.
• Bhang is prepared using the flowering top of the hemp plant and it is also less potent than ganja.

Thus, Bhang and Ganja are extracts of the hemp plant, Cannabis sativa.

Additional Information

Opioids:

• Opiates or drugs obtained from opium or artificially produced substitutes that have opium-like effects.
• They produce morphine-like effects.
• Medically they are primarily used for pain relief, including anaesthesia.
• Opioids are drugs, which bind to specific opioid receptors present in our central nervous system and gastrointestinal tract.
• Example: codeine, morphine, heroin.

Heroin:

• Heroin is an opioid drug made from morphine.
• It is a natural substance taken from the seed pod of the various opium poppy plants.
• Heroin can be a white or brown powder, or a black sticky substance is known as black tar heroin. 
• Heroin usage leads to euphoric, hallucinogenic, or sedating effects.