| Head typical of siluriforms with a dorsal process, i.e., quadrangular in proximal view for articulation with the spinal fossa. |
| This anterior projection helps receive the trochlea of the humerus and lies in the coronoid fossa of the humerus when the elbow is flexed. |
| The sigmoid may lie in the abdomen just inferior to the splenic flexure of the transverse colon, or in the right iliac fossa. |
| The cystic artery is ligated and transected and the gallbladder is dissected from the gallbladder fossa and the right hepatic lobe. |
| The basisphenoid bears a deep, central depression at this point called the sella turcica or pituitary fossa. |
| The lateral cutaneous nerve of the thigh passes from the lateral border of psoas major across the iliac fossa to pierce the inguinal ligament. |
