About: http://webisa.webdatacommons.org/68863401

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	So the heart is an electrically excitable tissue: it pumps due to action potentials that start from specialized heart cells called nodal cells and these nodal cells spread the action potential to surrounding heart cells.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com