tunica submucosa 中文意思是什麼
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The wall of digestive tube was composed of mucous membrane, thin submucosa, tunica muscularis and tunica adventitia, but duodenal gland in duodenum was not found
消化壁一般分為4層，由內向外為粘膜、粘膜下層、肌層和外膜，其中粘膜下層很薄，十二指腸粘膜下層無十二指腸腺。
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