Abstract：Microplastics refer to plastic fibers, particles or films less than 5 millimeters, as a new type of environmental pollutants, whose pollution situation and toxic effects have attracted extensive attention. Microplastics are widely distributed in the atmosphere, water and soil, and are enriched in organism through gastrointestinal tract ingestion, respiratory tract inhalation and skin contact. Microplastics can induce cytotoxicity, damage tissues and organs, and cause compound health hazards. In this paper, we systematically reviewed the exposure pathways, health hazards and mechanisms of microplastics in organisms, in order to provide reference for the studies into the environmental health hazards of microplastics.
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