To maintain normal body temperature, which is similar to that of humans, dolphins have a thick layer of blubber that insulates them from the sometimes cold ocean waters.
(normal body temperature; is; similar to that of humans) (dolphins; have; a thick layer of blubber) (blubber; insulates; them; from the sometimes cold ocean waters)
normal body temperature dolphins blubber
is have insulates
similar to that of humans
a thick layer of blubber
them from the sometimes cold ocean waters