This muscle originates on ribs 3-5 and inserts on the coracoid process. What is it?

The muscle that originates on ribs 3-5 and inserts on the coracoid process is the pectoralis minor. This muscle plays a significant role in stabilizing the scapula by drawing it anteriorly and inferiorly. It is located beneath the pectoralis major and is involved in movements such as protraction of the scapula, which is essential for certain upper limb motions.

Understanding the anatomy of the pectoralis minor provides insight into its function, especially its connection to the rib cage and the shoulder girdle. Its positioning allows it to effectively contribute to movements that engage the shoulder and support the upper body's mechanics.