To immune system : arsenic, mercury and dioxins can lower the ability of immune system against allergens and infectious bacteria, viruses and protozoa
To nervous system : neurotoxins such as arsenic, lead, PCBs and some pesticides (e.g. ParaquatTMin the coffee exercise) can lead to behavioral changes, learning disabilities, retardation, attention deficit disorder, paralysis and death
To endocrine system : certain pesticides, biphenolA (BPA), DDT, PCBs, mercury affect a complex network of glands and the release of hormones that control sexual reproduction, growth, development, learning ability and behavior
To respiratory system : see air pollutants and grey smog