TION 4 Date ranges (mya) Sagittal crest? (red circle) (Yes or No) Brain size (cc) Cranial base (flexed or flat) Wide zygomatic flare? (red line) (wide or relatively flat) Shape of maxilla (red square) (broad or narrow) Robust mandible? (robust or gracile) Incisor teeth size (small or large) Molar teeth size (small or large) A. afarensis (male) 4.2-3.0 No 400-500 Flat Flat Narrow Gracile Small Small 2.5-1.0 Yes 450-550 Flexed Wide Broad Robust P. boisei (male) Large Large Look at the size of molar teeth, the degree of zygomatic flare and the presence or absence of a sagittal crest as detailed on the above chart. What do these three features together tell us about the dietary habits of Paranthropus vs. dietary habits of Australopithecines (what were they eating)? 7:19 PM 11/11/2022 6

Q: O 100% O 75% O 50% O 0%

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Human Movement

Humans can move from one place to another through coordinated movements and postures. The movement produced by the human body due to the contraction of muscles and bending of bone joints is called human movement. Human movements are controlled by the nervous system. Hence, the human movement incorporates the use of muscles, ligaments, joints, and bones.  Kinesiology is the field that deals with the study of human movements.