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2 votes
What membranes lines the cavities and tubes in the digestive and respiratory system

User Jins Peter
by
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2 Answers

5 votes

Answer:

Mucous

Step-by-step explanation:

User Matthew Burke
by
8.4k points
3 votes
firstly they are not membranes and they are villi's which increase the surface area during digestion
User Seth Robertson
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8.3k points
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