Asked by KellyBiology 🌱

We have a science test approaching and I have forgot why mucus is in the lungs ?

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Amri Shakir

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Mucus has two main functions: 1. It keeps the lining of the epithelium moist which is useful for the diffusion of gases from the air into the blood in the lungs. As they diffuse much better while dissolved in liquid. 2. It traps dust, other particles and pathogens like viruses/bacteria which is then wafted out the lungs by cilia. Hope that helps!

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