The results of histological structure are follows:the parotid gland, one of salivary glands, is serous gland, both the submandibular gland and sublingual gland are mixed glands.
组织结构研究结果：唾液腺中腮腺为纯浆液性腺，颌下腺和舌下腺为混合性腺。
2
The intercalary duct of parotid gland is longer than the salivary glands, while the sublingualgland is the shortest.