The outermost layer of the earth which includes uppermost mantle and constitutes hard and rigid outer layer is called Lithosphere. Lithosphere if further subdivided into tectonic plates. Uper most part of earth (lithosphere) reacts chemically with atmosphere, hydrosphere, and biosphere.
The process of formation of soil also takes place in lithosphere by various chemical and physical reactions.
It is the branch of medical science that deals with the health of digestive system or gastrointestinal tract and its related disorders. Diseases like irritable bowel syndrome, hepatitis C falls under this category of medical science.
Related Journals of Gastroenterology
Journal of Vaccines & Vaccination, Rheumatology: Current Research, Immunome Research, Journal of Allergy & Therapy, Journal of AIDS & Clinical Research, Allergy: European Journal of Allergy and Clinical Immunology, Autoimmunity Journal, Clinical and Experimental Immunology, Autoimmunity Reviews, Clinical Immunology, Current Opinion in Allergy and Clinical Immunology, Current Opinion in Immunology, Journal of Asthma.