Question

Delineate three of the anatomical features of bipedality associated with the ancestry of modern humans. Be sure to provide the complete features and functions of each of the anatomical parts.

Answer 1

S- shaped spine, adducted hallux and formation of a calcaneous

Step-by-step explanation:

• The S-shaped spine helps humans stand on two legs in an upright position rather than have to use 4 legs. It aligns and balances the skull allowing it to be upright.
• The adducted hallux is the big toe which has been aligned with the other toes , in primates the big toe is not adducted and is used much like the thumb is on a hand, to hold objects and climb trees. The big toe aids in balance as one stands on the flat ground
• The formation of the calcaneous (heel bone) also aids in balance for when humans stand upright.