Assertion: lymphatic system's vessel | /r/HasAspect | one-way valves
Facets:
value: like veins
type: OTHER
Source sentences:
text: These vessels have muscular walls and one-way valves that keep the lymph moving in the right direction.
text: Like veins, the lymphatic vessels, which are known as lymphangions, have one-way valves to prevent any backward flow.
text: Like veins, the lymphatic vessels, which are known as lymphangions, have one-way valves to prevent any backward flow.