Ocean mammals&#0146; lungs are designed to collapse progressively with increased pressure, forcing oxygen from the alveoli, or air sacs in their lungs, and into the upper part of their respiratory system.
(lungs; are designed; to collapse progressively with increased pressure) (lungs; to collapse progressively; ) (lungs; forcing; oxygen from the alveoli, or air sacs in their lungs)
lungs lungs lungs
are designed to collapse progressively forcing
to collapse progressively with increased pressure
oxygen from the alveoli, or air sacs in their lungs