The study of anatomy

Abstract

Human anatomy concerns the structure of the human body. Anatomy is often interpreted as the study of only those structures that can be seen with the naked eye (gross anatomy). Anatomy also covers the study of structure at the cellular (histology) and subcellular level (ultrastructure). The formation (embryology) and growth of anatomical structures (developmental anatomy) influence their organization, appearance, and their relationship to other structures and often explain gross anatomical arrangement. Historically, physiology (the study of the function of the body) was regarded as a separate subject from anatomy but the relationships between structure and function (functional anatomy) is critical to understanding how the body works at all levels. Most modern dental curricula now have some degree of integration between anatomy and physiology to emphasize their interrelationship in the study of the human body. It is impossible to recognize changes in structure brought about by disease and their clinical manifestations and effects on function without an understanding of healthy structure and function. It is impossible to use any surgical procedures effectively and safely without a good working knowledge of the anatomy of the relevant part of the body. In clinical work, internal structures often need to be located accurately even when they cannot be visualized directly. A good example of this is the need to be able to locate the nerves supplying the teeth in order to deliver local anaesthetic accurately prior to carrying out a restoration or extraction. Fortunately, most structures have a fairly constant relationship to surface features (surface anatomy) to allow their position to be determined with considerable accuracy. Information about deep structures can also be obtained by the use of imaging techniques such as X-rays or scanning technology. Interpretation of radiographs and scans requires knowledge of the radiographic appearance of normal body structures (radiological anatomy). Surface and radiological anatomy are obviously of great practical importance and are covered in the relevant sections of the book. The principal aim of this book is to provide you with sufficient practical information about the anatomy of the human body to form a basis on which to build your clinical skills and practice.