What muscle group does the pectoralis major belong to?

The pectoralis major is categorized as part of the chest muscles due to its location and primary function. This large muscle lies at the front of the chest and is responsible for movements such as arm flexion, adduction, and rotation. Its name, "pectoralis," stems from the Latin word for "chest," which further solidifies its classification.

The chest muscles, which include the pectoralis major and its counterpart, the pectoralis minor, work together to facilitate various upper body movements, especially those involving the shoulders and arms. Understanding the function and location of this muscle is key for those studying anatomy, especially in fields related to fitness, health, or nail technology as it can influence upper body posture and movements relevant to that and other professions.