Dioxide enters the body through the respiratory tract or dissolves with saliva, from there via digestion to infuse into the blood. SO2 can be combined with small particles of dust or moisture to form H2SO4 acid particles, particles penetrate through the lungs into the lymphatic system. In the blood, SO2 participated in many chemical reactions to reduce alkali reserve in metabolic disorders causing blood sugar and protêin, causing lack of vitamin B and C, created methemoglobine to transfer the Fe2 + (dissolved) into Fe3 + (precipitate) caused the blockage of blood vessels as well as reduced oxygen transport capacity of erythrocytes causes of narrow, vocal cords, difficulty breathing.
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