The term "chest muscles" refers to a group of muscles located in the chest region that are responsible for various movements and actions. These include the pectoralis major, which is involved in arm movement; the pectoralis minor, which helps with shoulder stabilization; the serratus anterior, which helps with arm movement and rotation; and the internal intercostal muscles, which help with breathing. Together, these muscles make up the chest area and play a crucial role in various physical activities.