<prompt> Mubvunzo ndewokuti: Arthur Guytons Textbook of Medical Physiology inotaura kuti uwandu hwemvura mumunhu wepakati nepakati makirogiramu 70 hunenge huri marita 40, hunenge chikamu 57 muzana cheuwandu hwomuviri wake wose.? Nyaya yacho mvura yomuviri.  <response>: muviri womunhu une mvura yakawanda zvakadini? 