lymphatic system 淋巴系统 lymph vessel 淋巴管 A network of blunt ended vessels lacking direct connection to the blood vascular system. These vessels collect and drain fluids and macromolecules from interstitial spaces throughout the animal. They derive from a subpopulation of endothelial cells and have walls that are much thinner than the blood carrying vessels. Lymphatic vessels are usually classified as either superficial or deep. A vessel that contains or conveys lymph, that originates as an interfibrillar or intercellular cleft or space in a tissue or organ, and that if small has no distinct walls or walls composed only of endothelial cells and if large resembles a vein in structure. BTO:0000752 FMAID:30315 James Malone Lymphatic vessel MA:0000138 MAT:0000443 Segment of lymphatic tree organ, the wall and lumen of which are continuous with those of the veins, directly or indirectly; together with other lymphatic vessels and lymph nodes, it constitutes the lymphatic tree organ. Examples: bronchomediastinal lymph duct, thoracic duct. TAO:0005105 URI: http://www.ebi.ac.uk/cellline#lymph_vessel XAO:0000375 包含或传递淋巴的血管，起源于组织或器官中的纤维间或细胞间裂隙或间隙，以及如果小的话，没有明显的仅由内皮细胞构成的壁，并且如果大的话，则类似于结构上的静脉。 淋巴树器官的部分，其壁和管腔直接或间接地与静脉连续;与其他淋巴管和淋巴结一起构成淋巴树器官。例如：支气管纵隔淋巴管，胸导管。 淋巴管 钝端血管网络缺乏与血管系统的直接连接。这些血管收集和排出整个动物的间质空间中的流体和大分子。它们来源于内皮细胞亚群，并且具有比血液携带血管更薄的壁。淋巴管通常分为表面或深层。