What is the sticky liquid that traps germs and dirt in the lungs?

1 answer

1222275

2026-04-24 09:00

这个粘液状的物质叫做痰液，它是由呼吸道黏膜产生的，具有捕获和清除肺部细菌、病毒、尘埃和其他异物的作用。

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