Transverse Section of Abdomen: Level of S1, Anterior
Superior Iliac Spine Anatomy
Ileum, Vermiform appendix, Cecum, Internal abdominal oblique muscle, External abdominal oblique muscle, External iliac artery, Right ureter, Gluteus minimus muscle, Iliacus muscle, Internal iliac artery, Gluteus medius muscle, Synovial portion of sacroiliac
joint, Gluteus
maximus muscle, Syndesmotic portion of sacroiliac joint with interosseous ligaments,
Linea alba, Medial umbilical
ligament, Left
inferior epigastric artery and vein (lateral umbilical ligament), Rectus abdominis muscle, Descending colon (becoming
sigmoid colon), Transversus abdominis muscle Left ureter, Obturator nerve, Femoral nerve, Psoas major muscle, Common iliac vein, Lumbosacral trunk, Ala (wing) of sacrum, Anterior sacral foramen with anterior
ramus of S1, Posterior
sacral foramen, Sacral promontory, Intervertebral foramen and spinal sensory (posterior root) ganglion.
