已有5万余种化学物质被用作药物、家庭清洁剂、杀虫剂、食品及食品添加剂。消化道是这些物质吸收的重要途径,其绝大多数毒性也表现在消化道。由于职业或日常接触工业品,消化道每天接触有害化学物质,造成损害,导致该系统潜在或显见的疾病乃至废用(见表)。 More than 50,000 chemicals have been used as medicines, household cleaners, pesticides, food and food additives. The digestive tract is an important means of absorption of these substances, most of its toxicity is also manifested in the digestive tract. As a result of occupational or daily exposure to industrial products, daily contact with harmful chemicals in the digestive tracts causes damage that leads to potential or apparent disease or even waste of the system (see table).