Emphysema results when the delicate linings of the air sacs in the lungs become damaged beyond repair. Most commonly, the toxins in cigarette smoke create the damage. The lung changes of emphysema evolve slowly over years: 1  As the fragile tissues between air sacs are destroyed, air pockets in the lungs develop.2  Air becomes trapped in these spaces of damaged lung tissue.ost commonly, the toxins in cigarette smoke create the damage. The lung changes of emphysema evolve slowly over years: 1  As the fragile tissues between air sacs are destroyed, air pockets in the lungs develop. 2  Air becomes trapped in these spaces of damaged lung tissue.
In almost all toothed whale species, their teeth are cone-shaped and not used for chewing (the exception are Amazon River dolphins; they have two different types of teeth in their mouths). They hunt and catch one prey animal at a time, such as fish, squid, seals, sea lions and even birds.
No. There are toothed whales and baleen whales. Baleen whales do not have teeth; the baleen is like a strainer that hangs down from the upper part of the mouth and lets the whâ¦ale catch plankton, shrimp, small squid, and other small sea creatures.