About: http://webisa.webdatacommons.org/439199036

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	As blood passes through them, urea, toxins and other waste products are separated from the substances the body needs to retain (water, electrolytes, protein, etc.) and concentrated to form urine, which can then be excreted.
http://www.w3.org/ns/prov#wasQuotedFrom	microscopyu.com