Female back muscles, illustration - Stock Image - C052/4271 - Science Photo Library

Female back muscles, illustration. The muscles of the back can be divided into three groups; superficial, associated with movements of the shoulder, intermediate, associated with movements of the thoracic cage, and deep, associated with movements of the vertebral column. FERNANDO DA CUNHA/SCIENCE PHOTO LIBRARY

Female muscular system, illustration - Stock Image - F036/4756 - Science Photo Library

Back Muscles #22 by Sciepro/science Photo Library

Human Back Muscles #16 by Sebastian Kaulitzki

Female Back Muscles #2 Photograph by Sebastian Kaulitzki/science Photo Library

Female Back Muscles #2 by Sebastian Kaulitzki/science Photo Library

2,000+ Back Muscle Anatomy Stock Illustrations, Royalty-Free Vector Graphics & Clip Art - iStock

Back Muscles #1 by Sebastian Kaulitzki/science Photo Library

750+ Posterior View Female Anatomy Muscles Stock Photos, Pictures & Royalty-Free Images - iStock

Female back muscles, illustration - Stock Image - C052/4271 - Science Photo Library

5,700+ Back Muscles Stock Illustrations, Royalty-Free Vector Graphics & Clip Art - iStock

Female Back Muscles Stock Illustrations – 469 Female Back Muscles Stock Illustrations, Vectors & Clipart - Dreamstime

Female back muscles, illustration - Stock Image - C052/4271 - Science Photo Library

Back Muscles #1 by Microscape/science Photo Library

Female Back Muscles #2 by Sebastian Kaulitzki/science Photo Library