Lesson 5.3

Question 1

Changes in skull for bipedalism

Answer 1

Foramen magnum becomes more central
Also prognathism

Question 2

Spinal and weight carrying changes for bipedalism

Answer 2

S shaped spine, weight moves from inside to outside of knee, centre of gravity becomes lower from belly

Question 3

Changes in pelvis for bipedalism

Answer 3

Ilia become flared broader and shorter, sacrum long and thin to wide and a seperate coccyx amd then short and wide
Acetabulum get bigger and further apart

Question 4

Changes in legs for bipedalism

Answer 4

Femur becomes angled and lengthened
Gluteal muscle decreases
Calves are lengthened

Question 5

Change in arms for bipedalism

Answer 5

Phalanges become shorter and straighter
Arms decrease in length

Question 6

Changes in feet for bipedalism

Answer 6

Opposable toe gone
Heel bones heavier and larger
Foot is more arched and a double arch