He aha te pātai ki: "Ko te Pukapuka a Arthur Guyton mo te Hauora Hauora e kii ana ko te "te nui o te wai i roto i te tangata o te taumaha toharite (70 kirokaramu) e tata ana ki te 40 rita, he toharite 57 ōrau o tona taumaha tinana katoa". Ko te kaupapa ko te wai tinana.
"he aha te ōrau o te wai kei roto i te tinana?"