Final answer:
The right axillary border of the ribs is identified by the rib's angle of greatest curvature, which aligns with the medial border of the scapula.
Step-by-step explanation:
The position that demonstrates the right axillary border of the ribs can be determined by understanding the anatomy of the ribcage and its landmarks. Each rib is a curved, flattened bone that articulates with the thoracic vertebrae posteriorly, and most have anterior attachments via their costal cartilages to the sternum. The angle of the rib is the part with the greatest curvature and marks the most posterior extent of the thoracic cage, aligning with the medial border of the scapula in an anatomical position. To demonstrate the right axillary border, one would refer to the space inferior to the ribcage among the areas delimited by specific anatomical landmarks including the sternal angle, xiphoid process, and the ribs themselves. This precise location is clinically significant as it is essential for procedures such as chest tube placement.