The salivary glands mainly served to digestion pectin, however midguts had the auxiliary function.

对果胶的消化主要在胸唾腺，中肠起辅助作用；

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The salivary glands mainly served to digestion pectin, however midguts had the auxiliary function.

对果胶的消化主要在胸唾腺，中肠起辅助作用；

youdao