Back: Anatomy and function

Regions of the back and buttocks seen from the posterior view.

Chest & Abdominal Muscle Groups

Human back - Wikipedia

The 10 Best Upper Back Exercises for Muscle & Strength – StrengthLog

Back: Anatomy and function

Trapezius Muscle - Anatomy, Origin, Insertion, Function, Exercise

The Spine, Part 1: Function and Malfunction

The Anatomy of Your Back Muscles, Explained (and How to Train Them

The 10 Best Upper Back Exercises for Muscle & Strength – StrengthLog

Lower Back (Human Anatomy): Image, Function, Diseases, and Treatments

Anatomy of the back: Spine and back muscles

Back muscles: Anatomy and functions

Erector Spinae - Physiopedia