Final answer:
The bronchovesicular breath sound is heard between the scapulae near the spinal column between the first and sixth ribs, especially on the right side, due to the presence of major bronchi in that area.
Step-by-step explanation:
The breath sound that is heard posteriorly between the scapulae near the spinal column between the first and sixth ribs, especially on the right side, is the bronchovesicular breath sound. This type of sound is typically heard over the major bronchi where there are fewer alveoli. Bronchovesicular sounds are intermediate between vesicular and bronchial breath sounds, indicating air flow through the bronchial tree.
The trachea bifurcates into the right and left bronchi, with the right lung being larger and containing three lobes. The bronchial tree continues to branch into smaller bronchioles ending in alveoli where gas exchange occurs. The area between the scapulae and near the spinal column is proximal to these bronchi, hence, the bronchovesicular sounds are more prominent in this region, especially since the right lung is larger and contains more bronchial tree structures.