Inflammatory bowel disease (IBD) predominantly affects the gastrointestinal system but it is associated with a large number of extraintestinal manifestations.
炎症性病(IBD)病变,亦常合并各种外表现。
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The main job of the gastrointestinal system is ingestion - taking in food, digestion - breaking it down into nutrients, absorption - pulling these nutrients into the bloodstream, and finally, excretion - getting rid of waste.
消化有大功:一是进食,即摄入食物;二是消化,将食物分解成营养成分;三是吸收,即把营养成分吸收入血液;是排遗,即排出不消化吸收的废物。