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.
These plates hang down from their upper jaw and allow the whales to filter their prey (usually planktonic animals and small fish) from the seawater. This group consists of the blue whale, fin whale, right whale, humpback, minke, and others. The Odontocetes, or toothed whales, use teeth to seize and capture their prey.