Ecstacy and heroin, cannabis and cocaine - illegal drugs
alcohol, nicotine, caffine- legal drugs
Drugs alter the chemistry of your body hence why they cause great harm
once addicted to drugs you become dependent
if a user was to refrain from taking drugs they would feel very unwell suffering from headaches shaking sweating ect these are called withdrawl symptoms
people take drugs because of peer presure and because it makes them feel good about themselves
Infectious dieseases are caused by microorganism entering and attacking the body
microorganism of this sort are called pathogens
bacterian and vruses cause diseases because ince they are inside the bisy they reproduce rapidly.
bacteria split into two amd they produce toxins which affect the body.
Viruses take over the cell as they reproduce damaging and destroying them.
There are ways to prevent the spread of pathogems:
Droplet infection: when you cough sneeze or talk tiny droplets come from you mouth. other people breathe in the droplets and the pathogens they contain. So they pick up the common cold or influenza
Direct contact: some diesease are spread through direct contact of the skin eg sexually transmittebd disease like gential herpes
Contaminated food and drink: Eating raw or uncooked food and drinkwing sewage water can spread diseases eg diarrohea