Assertion: vein's valve | /r/CapableOf | prevent backflow of the blood
Facets:
value: into the left ventricle
type: TRANSITIVE-OBJECT
value: primarily
type: DEGREE
Source sentences:
text: Leg veins have valves which prevent backflow of the blood being pumped against gravity by the surrounding muscles.
text: Contain valves to prevent back flow of blood
text: The tunica intima differs from the inner layer of an artery: many veins, particularly in the arms and legs, have valves to prevent backflow of blood, and the elastic membrane lining the artery is absent in the vein, which consists primarily of endothelium and scant connective tissue.
text: • It is lined with semi-lunar valves which prevent the backflow of blood.
text: Veins contain valves that primarily prevent the back-flow of blood.
text: b. Blood pressure is maintained in veins by contractions of the smooth muscle in the walls of the veins that squeeze venous blood toward the heart and the presence of valves which prevent backflow of the blood.
text: d. Blood pressure is maintained in veins by the contractions of surrounding skeletal muscles that squeeze venous blood toward the heart and the presence of valves which prevent backflow of the blood.
text: Many veins have valves to prevent back flow of blood, whereas venules do not.
text: The aortic valve sits between the left ventricle and the aorta and prevents backflow of blood into the left ventricle after it contracts.
text: In addition, veins are structurally different than arteries in that veins have valves to prevent the backflow of blood.