part of part of has part has part vasculature lymph lymph vasculature 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 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.[TAO] FMA:63815 TAO:0005105 UBERON:0004536 ZFA:0005105 consider merging with parent lymph vessels lymphatic trunks and ducts lymphatic vasculature lymphatic vessel network lymphatic vessels set set of lymphatic vessels trunci et ductus lymphatici uberon lymphatic part of lymphoid system