organs strung together functionally and usually structurally form
1 Systemic anatomy is the study of the structure of organ systems, such as the skeletal system or the muscular system. 2  Organ systems are groups of organs that function together in a coordinated manner. Surface anatomy is the study of general form and superficial markings. 2  Regional anatomy focuses on the anatomical organization of specific areas of the body, such as the head, neck, or trunk.