About: http://webisa.webdatacommons.org/340052171

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	Most all our joints, especially the true ball and socket such as the hip, contain a thin sac of tissue filled with synovial fluid to assist with motion, reduce friction and to act as a cushion.
http://www.w3.org/ns/prov#wasQuotedFrom	medhelp.org