Physical barriers include skin, which acts as a barrier, and mucus in the airways, which traps pathogens before being moved by cilia to be swallowed.
Liste exemplos de barreiras físicas e como elas protegem contra patógenos: A pele atua como uma barreira para impedir que eles entrem. Muco no nariz e na traqueia prendem patógenos e cílios transportam o muco para a garganta para ser engolido.
| Front | List the examples of physical barriers and how they protect against pathogens |
|---|---|
| Back | Skin acts as a barrier to stop them getting in. Mucus in your nose and trachea trap pathogens and cilia waft the mucus up to the throat to be swallowed. |
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