Human beings are terrestrial (land-dwelling) mammals, and as such our lungs are designed to breathe gas, but unlike fish our bodies have no gills and so obviously we are unable to extract oxygen from the surrounding water in order to breathe.
(Human beings; are; terrestrial (land-dwelling) mammals) (we; to extract; oxygen; from the surrounding water) (such our lungs; are designed; to breathe gas) (such our lungs; to breathe; gas) (our bodies; have; no gills)
Human beings we such our lungs such our lungs our bodies
are to extract are designed to breathe have
terrestrial (land-dwelling) mammals
oxygen from the surrounding water
to breathe gas
gas
no gills