Hepatitis B. The term hepatitis means inflammation of the liver. When the liver is inflamed, it can have a harder time doing some of its jobs. (See Understanding the Liver .) A hepatitis virus is one that lives in liver cells and causes inflammation.Different hepatitis viruses have been given different names, such as A, B, and C.epatitis B virus is contained in blood and body fluids. It is not contained in food or water. It is passed from person to person when blood, semen, or other body fluid infected with the virus enters the body of a person who is not infected.
Geography is the study of life on the surface of the earth. Historically it has consisted of two main branches, human geography and physical geography. Human geography has three general foci: characterizing and explaining the differences between places in the present and throughout time.
A person who studies earthquakes is called a seismologist. Seismologists study earthquakes by using seismographs and by venturing into the field to view the damage caused by an earthquake.