What are the physical effects of various addictions on human ?

Explanation

i. A person may get addicted to various harmful substances like alcohol, tobacco, cigaratte, gutkha, drugs, etc.
ii. Excessive consumption of liquor leads to decrease in efficiency of nervous system (especially brain) and liver a nd reduces the lifespan of the person. In adolescents, it affects brain development and reduces ability of memorization and learning.
iii. Temporarily intoxicating drugs of plant orgin as well as some chemicals can permanently damage the human nervous system, muscle system, heart, etc.
iv. The use of tobacco and lead to cancer of mouth and lungs.