With the new twelfth edition, biologists will find that visualizing human structure has never been clearer. Significant enhancements have been made to the graphics integrated throughout the chapters. Large and vibrant illustrations, the extensive use of dissected cadaver photographs, and detailed micrographs are carefully integrated with the crisp narrative. Additional coverage of clinical material has been included. Biologists are also given the opportunity to explore structure from diverse perspectives and gain insights into the vital contributions that anatomical knowledge brings to the understanding of functions, diagnosis and treatment of disease.