<p>This Architectural Drawing is AutoCAD 2d drawing of Human CAD block plan in AutoCAD, dwg file. The human body is <strong>a complex, highly organized structure made up of unique cells that work together to accomplish the specific functions necessary for sustaining life</strong>. Overview of the Human Body: Cells, Tissues, Organs, and Organ Systems. VIDEO. The biology of the human body includes. Physiology (how the body functions)</p>