Describe the function and components of the mucosal barrier of the stomach. Protects the stomach from autodigestion Components Thick coating of bicarbonate-rich mucus Tight junctions of the epithelial cells Plasma membrane of gastric glands are impermeable to HCl.
World Range & Habitat. Sea lampreys, Petromyzon marinus, are found only in the Mediterranean and North Atlantic, in the coastal seas off the North East USA, Nova Scotia, southern Greenland, the UK, Ireland and Scandinavia. They are also found in the Great Lakes and enters inland freshwater rivers and streams to breed.
October 25, 2006. Add the lamprey to the list of living fossils.. A 1.7-inch (4.2-centimeter) fossilized specimen found in an ancient South African lagoon shows that the bloodsucking, eel-like fish hasn't changed much in 360 million years, according to a new study to be published tomorrow in the journal Nature. Enlarge Photo.