口腔软组织的胶原蛋白，水，色素沉着的结缔组织，血液和淋巴管组成。
Oral soft tissue is composed of collagen, water, pigmented connective tissue, blood and lymphatic vessels.
肿瘤患者的肿瘤细胞可以通过血液和淋巴管发生远处转移，肿瘤患者淋巴管新生明显增加。
Tumor cell metastasize by blood and lymphatic vessel, and lymphangiogenesis is obviously increased in patients with tumor.
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