Fig. 11

Structures contained in the internal urogenital sinus compartment and compartment boundaries. The internal urogenital compartment is limited anteriorly by the anterior wall of the urethra and posteriorly by the distal rectovaginal septum. It contains the urethrovaginal subcompartment composed of the posterior wall of the urethra, the uretrhrovaginal septum, and distal 1/3 to 1/4 of the vagina. High resolution sagittal (left) and axial (right) images depict compartment structures (a and b) and compartment (light orange) and subcompartment (dark orange) boundaries (c and d)