Structure-Function.org

Os Coxa, Left

1. Pubis
2. Ischium
3. Ilium

1. Posterior superior iliac spine
2. Posterior inferior iliac spine
3. Greater sciatic notch
4. Ischial spine
5. Lesser sciatic notch
6. Ischial tuberosity
7. Ischial ramus
8. Inferior pubic ramus
9. Obturator foramen
10. Superior pubic ramus
11. Pubic tubercle
12. Acetabulum
1. Acetabulofemoral joint with head of left femur
13. Anterior inferior iliac spine
14. Anterior superior iliac spine
15. Inferior gluteal line
16. Anterior gluteal line
17. Iliac crest
18. Posterior gluteal line

This irregular-shaped bone is actually composed of three-fused bones (i to iii) that come together to form the composite structure (L) that translates to "little vinegar cup" in Latin.

Feature L helps you determine that you are observing the lateral aspect of this bone and will help you determine its side (left or right) if you recall that features A through F point posteriorly.