Ko ngā whēkau me ngā pūtautau e uru ai te hau ki roto i te tinana, e whakawhitia ai te hāora o roto i te hau ki ngā toto, e tangohia ai te hauhā o ngā toto, e whakaputaina anō ai taua hauhā ki waho o te tinana. Ko ngā pūkahukahu te whēkau matua o te pūnaha arahau, ki reira mahia ai ngā mahi matua.
The organs and tissues that collectively enable a person to breathe air into the body, transferring the oxygen to the bloodstream, removing carbon dioxide from the blood, and discharging it out of the body. The lungs are the main organ in the respiratory system where this function is carried out.