Radiological studies as well as endoscopic procedures are unnecessary in the early management of these patients thus being relegated to recurrent or persistent bleeding. 1  Bonita F. Stanton; Kliegman, Robert; Nelson, Waldo E.; Behrman, Richard E.; Jenson, Hal B. (2007).
Geography can be either a natural or social science; if you are studying the physical structure of the Earth, such as the locations of bodies of water, mountains, rivers, deseâ¦rts, etc., that is a type of natural science, and if you are studying national borders and political divisions marked on a map, that is a type of social science.
Natural sciences are a scientific branch that deals with observations, understanding and predictions of natural phenomena. It is a diverse field and includes disciplines such as biological science, physics, chemistry, Earth science and astronomy. Europe is the sixth largest continent and includes 47 countries and assorted dependencies, islands and territories. It is bordered by the Mediterranean Sea to the south, Asia to the east, and the Atlantic Ocean to the West.