CAMRT Radiography Practice Exam

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Which rib is known to attach to the sternal angle?

First rib
Second rib
Third rib
Fourth rib

The correct answer is: Second rib

The second rib is known to attach to the sternal angle, which is also referred to as the angle of Louis. This anatomical landmark is significant because it marks the junction where the manubrium meets the body of the sternum. The second rib articulates directly with the sternum at this point, making it a key feature in describing the location of other structures in the thoracic region. Understanding the importance of the sternal angle is crucial for identifying other anatomical relationships, such as the location of the aortic arch and important thoracic landmarks. The sternal angle is also used to count ribs and locate intercostal spaces during clinical examinations, which further emphasizes the significance of the second rib's attachment.