胶质

jiāo zhì bǎo hù mó

胶质保护膜

colloidal protective film

zhǐ yǒu zài ruò suān xìng de xiàn tǐ zhōng cái néng chǎn shēng jiāo zhì

只有在弱酸性的腺体中才能产生胶质。

The gland in which the glue is generated is mildly acidic.