颌下腺属混合腺，以混合性腺泡为主，有少量浆液性腺泡和黏液性腺泡，有闰管、颗粒曲管和分泌管；
The submandibular gland, which is a mixed gland containing more mixed acinus than serous acinus and mucous acinus, contains intercalated duct, GCT, and secretory duct.
因为中耳分泌物可以是浆液性漏出液，也可为浆液性渗出液和粘液。
Because of middle ear secretions can be serous transudate, but also as a serous exudate and mucus.
蜂蜜是蜜蜂分泌的浆液加工制成的。
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