Seal serum offers protection from inflammation
(PHYSorg.com Biology)

Seal lungs can take a terrible pounding when one of the mammals leaves the surface. When the lungs collapse during deep descents in order to protect the animal, the delicate tissues incur damage as they are crushed, then suffer blood and oxygen flooding back when the animals return to the surface. In addition, the fragile tissues could suffer inflammation, which is usually triggered to heal any damage.