Why do premature infants have respiratory problems?

Specialized coating: Surfactant is one of the last things for a fetus to produce, like paint for your rooms, you get everything else built before the finish work.Prematurity can delay production.The material works on the walls of the air pockets in the lungs to keep them partially open when you exhale.Without the coating, these air pockets empty like a balloon & take excessive force to reopen.That gives respiratory pbs.