Question: what is the origin and insertion of serratus anterior?
Answer: The serratus anterior muscle originates at the 1st to 9th rib and inserts at the ventral surface of the medial border of the scapula. ... Intermediate part: 2nd to 3rd rib → medial border of the scapula. Inferior part: 4th to 10th rib → medial border and inferior angle of the scapula.