Assertion: vein | /r/CapableOf | pump blood
Facets:
value: toward the heart
type: TRANSITIVE-OBJECT
Source sentences:
text: Sitting or standing for extended periods : Veins in the legs have to work harder to pump blood up toward the heart when a person remains in the same position for several hours at a time.
text: Veins rely on gravity, inertia, and the force of skeletal muscle contractions to help push blood back to the heart.
text: Here, contracting skeletal muscles press against veins forcing blood through
text: : Veins in the legs have to work harder to pump blood up toward the heart when a person remains in the same position for several hours at a time.