TRUE or FALSE: The glenoid labrum functions to deepen the shoulder joint because the glenoid fossa is so shallow.

The statement is true because the glenoid labrum plays a significant role in stabilizing the shoulder joint, primarily due to the shallowness of the glenoid fossa. The glenoid fossa, which is the socket of the shoulder joint, is relatively shallow, making it less effective at holding the humeral head (the ball part of the joint) in place. The glenoid labrum is a fibrocartilaginous structure that surrounds the glenoid fossa and effectively deepens the socket. This addition of depth increases the surface area of the joint, providing a more secure fit for the humeral head and improving joint stability. Furthermore, the glenoid labrum also serves as an attachment point for important ligaments and tendons, contributing to the overall stability and function of the shoulder. Thus, understanding the function of the glenoid labrum and its impact on the shoulder joint is crucial for comprehending shoulder biomechanics and injury prevention.