Primary Function: Rauemi Tauwhitiwhiti Ko Venous Materials he rauemi tauwhitiwhiti e mahi ana hei pūoko me te whakaatu. He kōawa wai angiangi kua hangaia ki roto i te hirikona ngohengohe, ā, ka neke te waituhi tae mā ngā kōawa. Ka piko te kaiwhakamahi i te rauemi, ka pēhi rānei, ka rerekē te rere o te waituhi, ka waihangatia he tauira kitea me ngā panonitanga tae. He ngohengohe te rauemi, he tū motuhake anō hoki, ā, ko te nekehanga o te kaiwhakamahi te puna hiko. He taputapu hoahoa rorohiko e taea ai te whakatairite i te āhuahanga me te rere o te wai i mua i te whakaputanga. Ko te whakaputanga ka whai wāhi ki te whaowhao papura me ngā tukanga taiwhanga.