Anatomy, a field in the biological sciences concerned with the identification and description of the body structures of living things. Gross anatomy involves the study of major body structures by dissection and observation and in its narrowest sense is concerned only with the human body. "Gross anatomy" customarily refers to the study of those body structures large enough to be examined without the help of magnifying devices, while microscopic anatomy is concerned with the study of structural units small enough to be seen only with a light microscope.
Human anatomy is the study of the structures of the human body. An understanding of anatomy is key to the practice of health and medicine. The word "anatomy" comes from the Greek words "ana," meaning "up," and "tome," meaning "a cutting." Studies of anatomy have traditionally depended on cutting up, or dissection, but now, with imaging technology, it is increasingly possible to see how a body is made up without dissection. There are two ways of looking at anatomy: Gross, or macroscopic, anatomy and microscopic anatomy.