Which muscle makes up the bulk of the chest muscles in males?

The pectoralis major is the muscle that constitutes the bulk of the chest muscles in males, as it is the largest and most prominent muscle in this area. It is a thick, fan-shaped muscle that covers much of the upper chest and is responsible for a range of movements of the shoulder joint, including flexion, adduction, and internal rotation of the humerus.

Its size and position make it a key player in the muscular structure of the chest, contributing not only to the overall shape and definition of the male chest but also to powerful movements like pushing and lifting. This prominence and functionality are why it is often targeted in exercises aimed at developing upper body strength and aesthetics. The other muscle options listed are important for different functions but do not have the same bulk or primary role in shaping the male chest.