Anatomy: Primarily the scientific study of the morphology of the adult human body.
Histology: The study of tissue sectioned as a thin slice, using a microtome. It can be described as microscopic anatomy.
Pathology: study and diagnosis of disease through examination of organs, tissues, cells and bodily fluids.
Embryology: The study of the development of an embryo. An embryo is defined as any vertebrate in a stage before birth or hatching.
Physiology: Study of the mechanical, physical, and biochemical functions of a human body.
Biochemistry: The study of the chemical processes in a human body.
Microbiology: Study of microorganisms, which are unicellular or cell-cluster microscopic organisms.
Virology: Considered a part of microbiology or of pathology, is the study of biological viruses and virus-like agents: their structure and classification, their ways to infect and exploit cells for virus reproduction, the diseases they cause, the techniques to isolate and culture them, and their potential uses in research and therapy.
Parasitology: Study of parasites, their hosts, and the relationship between them.
Immunology: Broad branch of biomedical science that covers the study of all aspects of the immune system in all organisms.
Epidemiology: Study of factors affecting the health and illness of populations, and serves as the foundation and logic of interventions made in the interest of public health and preventive medicine.
Anthropology: Study of humanity, medical ethics etc.
Hematology: branch of physiology, pathology, clinical laboratory, internal medicine, and pediatrics that is concerned with the study of blood, the blood-forming organs, and blood diseases.
Pharmacology: Study of how drugs interact with living organisms to produce a change in function.
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OMG. I just realised that theres still so many of them which i can't think of now. It's only for a merely 2 years of pre-clinical studies! We still have radiology, cardiology, anaesthesiology, neurology, gynaecology, gastroenterology, opthamology etc etc going on for our remaining 3 years of clinical studies! Ahhh. The reason we studied so much? It is to save lives and to contribute to the society. Life won't be as easy as the past anymore. Sigh. So, cool doctors also study hard one a'rite? Haha.