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No. 11. Introduction of Human Anatomy2. Introduction of Osteology (Bony System) Introduction of Human Anatomy Definition: Human anatomy is the science which deals with the gross morphology and spacial interrelations of the structures of the body. The term “anatomy” is derived from the Greek words meaning “apart” and “to cut.” Significance: For medical students, human anatomy is the basic course of preclinical and clinical curriculum. Classification: Owing to different methods and purposes of study, human anatomy is classified into systematic anatomy, and regional anatomy. Ⅰ. Fields of anatomy (classification) Gross anatomy and microscopic anatomy The study of anatomy involves examination of the general structures of the body (gross anatomy) as well as those structures that can be seen only with the aid of a microscope (microscopic anatomy). Microscopic anatomy includes the study of cells (cytology) and the study of tissues (histology). When anatomy is studied under the extremely high magnifications possible with the electron microscope, it is referred to as fine structure or ultrastructure. Regional anatomy and systematic anatomy: Gross anatomy can be studied by regions, such as the head, neck, thorax, abdomen, pelvis, or limbs. This approach, referred to as regional anatomy, is often used in dissection, in which all structures in a region are studied simultaneously. However, for our purposes the study of anatomy by organ systems that perform common functions (systemic anatomy) is most beneficial and this book uses that approach. Developmental anatomy: This subdivision of anatomy, focuses on the development of the body from the fertilized egg to the adult form. Developmental anatomy includes embryology, which is limited to prenatal development. Radiographic anatomy is particularly valuable in the diagnosis of disorders and injuries. Ⅱ. The general structure of the human body There are four structural levels in the bod