Final answer:
The transversalis fascia attaches to the pubic tubercle to form the inguinal ligament, a key structure in the inguinal region that demarcates the boundary for the inguinal canal and is clinically significant for abdominal hernias.
Step-by-step explanation:
The transversalis fascia is a thin membrane that forms the inner layer of the abdominal wall. It plays a role in stabilizing the structure of the abdomen and providing a surface for muscle attachment. The fascia attaches to the pubic tubercle, which is a prominent forward-projecting knob on the upper portion of the pubic bone's superior margin.
This attachment is important as it contributes to the formation of the inguinal ligament. The inguinal ligament is formed when the lowermost fibers of the external oblique aponeurosis fold back on themselves from the anterior superior iliac spine to the pubic tubercle. This ligament is a key structure in the inguinal region; it demarcates the boundary for the inguinal canal and therefore has clinical significance especially when considering abdominal hernias.