闰管为腮腺最长，颌下腺次之，舌下腺最短。
The intercalary duct of parotid gland is longer than the salivary glands, while the sublingual gland is the shortest.
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.
结果集合小管是由主细胞和闰细胞组成。
Results The results provide the facts that collecting duct consists of principal cells and intercalated cells.
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