The best way to divide the abdomen is by using two vertical planes and two horizontal planes.
Vertical planes are midclavicular two lines passing beside the middle of the abdomen.
The antilateral muscles compose the sides and front of the abdomen. It has five muscles: the transverse muscle, the oblique internal, the muscle big right, the oblique external muscle, and the pyramidal muscle.
The abdonimnal posterior muscles compose of the back part of the abdomen. The