To see the muscles of the back click here . Questions or comments can be forwarded to Ralph Larmann at the University of Evansville . The shoulder muscles are called deltoids . These triangular muscles define the upper shoulders. The palmaris longus muscle will protrude in the wrist area when you make a fist and flex your biceps.
Biceps are easily recognizable large bumps on the upper inside of the arm.
These have been used by artists to symbolize physical strength especially in men. The pectoralis muscles span the chest. They are often developed by body builders and also are used to symbolize strength. The abdominal muscles create rhythms and changes in the stomach area. They are generally drawn as four vertical segments next to four others.