1 / 11

From Primate ancestors to…

From Primate ancestors to…. Hominins. Walking on two feet?. How does that work?. Bipedalism!. To walk habitually on two feet, there had to be substantial changes to the pelvis, knees, and feet.

vonda
Download Presentation

From Primate ancestors to…

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. From Primate ancestors to… Hominins

  2. Walking on two feet? How does that work?

  3. Bipedalism! To walk habitually on two feet, there had to be substantial changes to the pelvis, knees, and feet. The 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…

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

  5. 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.

  6. More Ossa Coxae

  7. Bipedalism! To walk habitually on two feet, there had to be substantial changes to the pelvis, legs/knees, and feet. The Legs and Knees …

  8. Longer legs, full knee extension Land on heal ·Push off toes ·Longer limbs to maximize movement ·Full extension of Knee

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

  10. Bipedalism! To walk habitually on two feet, there had to be substantial changes to the pelvis, legs/knees, and feet. The Feet…

  11. Foot as stable suport

More Related