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.
sea lampreys are members of an ancient family of jawless fishes that were around before the time of the dinosaurs the sea lamprey was first discovered in 1835 sea lampreys are aquatic vertebrates native to the atlantic ocean sea lampreys resemble eels but unlike eels they feed on large fish sea lampreys are members of an ancient family of jawless fishes that were around before the time of the dinosaurs