tatianadiamondl
tatianadiamondl
20-04-2017
Biology
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help with question #10. Bio 20-2
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sidsquidanne
sidsquidanne
20-04-2017
the stomach
walls have a lining that contains epithelial cells that have a protective layer of mucus and bicarbonate. The mucous is pretty much the same stuff which lines our throat and nose.
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