Final answer:
An AP Lower rib study typically shows ribs 8 through 12, which include the false and floating ribs. These ribs are essential for imaging in clinical settings and are related to protecting internal organs and assisting in breathing and posture.
Step-by-step explanation:
In an AP Lower rib study, which focuses on the anatomy of the ribs, the range of ribs typically visible are ribs 8 through 12. These are considered the lower ribs and include both false ribs and floating ribs. The second rib attaches at the sternal angle, which is a key landmark in identifying and counting ribs, particularly for imaging in a clinical setting.
It is important to visualize these lower ribs as they articulate posteriorly with the thoracic vertebrae T8-T12, and anteriorly, the false ribs (ribs 8-10) are attached to the cartilage of the rib above, while the floating ribs (11-12) have no anterior attachment to the sternum or other ribs. The anatomy of these ribs, including the head, neck, tubercle, angle, and body, plays an important role in protecting the lower thoracic organs and provides attachment sites for muscles involved in breathing and maintaining the body's posture.