alcohol and other carcinogens ethanol - very toxic and addictive
removed by liver
passes from gut --> blood --> brain
affects nervous system - thoughts reflexes and reactions slower
sometimes makesyou happy
leads to lack of self control and judgement
too much deadly
liver damage
cirrhosis destroys liver tissue
alcohol is carcinogen, spreads quickly and is difficult to treat
causes brain to become soft and pulpy
structures lost can lead to death
usually takes years to be detected.
PREGNANCY
miscarriage, still birth, premature, low birth weight.
foetal alcohol syndrome = facial deformity, teeth, hearing, kidneys, liver and heart problems, learning and development problems,
the more you drink the more risky it is for the unborn child
IONISING RADIATION
electromagnetic waves and radioactive materials penetrate cells and damage chromosomes and cause mutations in dna
the more you are exposed to them the more likeley you are to have cancer.
ultarviolet from the sun - skin cancer
radioactive substances in soil water and air
medical and dental xrays
accidents and nuclear power generators e.g chernobyl