Final answer:
The posterior wall of the annulus fibrosus is thinner than the anterior wall due to fewer fibers and less structural reinforcement.
Step-by-step explanation:
The posterior wall of the annulus fibrosus is thinner than the anterior wall.
The annulus fibrosus is the tough, fibrous outer layer of an intervertebral disc. It is composed of thick, oval-shaped rings that surround the softer inner nucleus pulposus. The posterior wall of the annulus fibrosus is thinner because it has fewer fibers and is less structurally reinforced compared to the anterior wall.