About: http://webisa.webdatacommons.org/417409461

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Unlike the arterial system, in which blood is propelled by the forceful, rhythmic contractions of the heart, the force that propels venous blood back to the heart and lungs is generated mainly by muscles that surround the veins.
http://www.w3.org/ns/prov#wasQuotedFrom	life-enhancement.com