Muscles of the back. Labels: 50, latissimus dorsi; 51, trapezius; 52, deltoid. The muscles of the back are in 5 layers, one beneath another. The two largest and most superficial are the trapezius and the latissimus dorsi.

Muscles of the Human Back

Muscles of the back. Labels: 50, latissimus dorsi; 51, trapezius; 52, deltoid. The muscles of the back…

Muscles of the back. On the left side is exposed the first layer; on the right side, the second layer and part of the third.

Back Muscles

Muscles of the back. On the left side is exposed the first layer; on the right side, the second layer…

Deep layers of the muscles of the back.

Back Muscles

Deep layers of the muscles of the back.