| 21. | A "'lymph duct "'is a great lymphatic vessel that empties lymph into one of the subclavian veins.
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| 22. | Nevertheless, during tumorigenesis VEGF-D promotes formation of tumor lymphatic vessels and facilitates metastatic spread of cancer cells.
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| 23. | Cystic hygromas occur when the lymphatic vessels that make up the lymphatic system are not formed properly.
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| 24. | Capillary plexuses and lymphatic vessels spread from the retroperitoneal lymph sac to the abdominal viscera and diaphragm.
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| 25. | Importantly, the meningeal lymphatics present several unique attributes that differentiate them from lymphatic vessels in peripheral organs.
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| 26. | Genetically engineered mice that lack the meningeal lymphatic vessels demonstrated attenuated clearance of macromolecules from the brain.
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| 27. | It also contains the hair follicles, sweat glands, sebaceous glands, apocrine glands, lymphatic vessels and blood vessels.
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| 28. | It encloses the appendicular artery and vein, as well as lymphatic vessels, nerves, and often a lymph node.
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| 29. | Subsequent experiments revealed that meningeal lymphatic vessels absorb cerebrospinal fluid and drain into the deep cervical lymph nodes.
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| 30. | Interestingly, the meningeal lymphatic vessels are also unique for their scarcity of valves, which prevent back-flow of lymph.
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