The muscles primarily attached to the arm bones are:
- Biceps: The biceps brachii muscle is attached to the scapula and the forearm bones, playing a key role in flexing the elbow and rotating the forearm.
- Pectoralis muscles: The pectoralis major and minor muscles attach to the upper arm bone (humerus) and the chest, aiding in movements like pushing.
- Latissimus dorsi: This large back muscle is attached to the humerus and plays a crucial role in extending, adducting, and rotating the arm.
The quadriceps are not attached to the arm bones; they are located in the thigh.
In summary, the appropriate responses regarding muscles attached to the arm bones are biceps, pectoralis muscles, and latissimus dorsi.