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.
One is the toothed whales, which are carnivorous. The other group is the baleen whales, which use baleen to strain plankton from the ocean waters. Plankton is the term applied to an extremely broad group of tiny living things that inhabit a particular zone or depth range in the waters.