1. Chapter 8 Primate and Hominin Origins

2. What are these?  Primate  Australopithecine  Homo  Hominin

3. Primates Review Me too! *Go back to the chart on pg. 129

4. Becoming Human review…  Lucy and bipedalism Lucy and bipedalism  Habitual vs. Obligate Bipedalism  Ossa Coxae  Foot as stable support  Longer legs  Full knee extension

5. Lucy and Human pelvic structure  Pelvis is comparatively much shorter and broader than an Ape’s and extends around to the side, stabilizing the line of weight transmission from lower back to hip joint  Example…

6. Human Os Coxae  The human os coxae is composed of three bones (right side shown).

7. Ossa Coxae (“hip bones”)  (a) Homo sapiens.  (b) Early hominin from South Africa.  (c) Great ape.  Note the length and breadth of the iliac blade (boxed) and the line of weight transmission.

8. More Ossa Coxae

9. Foot as stable suport

10. Land on heal · Push off toes · Longer li m bs to maximize movement · Full extension of Knee Longer legs, full knee extension

11. Femur - The femur is angled inward, keeping legs under the body