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MissTica
3 years ago
10

Mucous membranes provide a ____________ barrier at body openings.

Biology
1 answer:
butalik [34]3 years ago
8 0
<span>Mucous membranes provide a mechanical barrier at body openings. They also line the respiratory, GI, urinary, and reproductive tracts. Mucous membranes secrete mucus, a slimy substance that traps pathogens. The membranes also have hair-like cilia.</span>
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2 years ago
In your own words, what is the definition for Chitin?<br><br> what purpose does chitin serve?
lidiya [134]

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Explanation:

Hope this helps!

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2 years ago
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ludmilkaskok [199]
Okay so i hope this help but i think its this:

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7 0
3 years ago
Read 2 more answers
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Answer:

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