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1 1 |  curvature of the legs. For man bends his legs convexly, a bird
2 1 |      bent concavely; again, man bends his arms and legs in opposite
3 1 |      And a viviparous quadruped bends his limbs in opposite directions
4 9 |    zigzag, becoming lower as he bends, and higher when he stands
5 12|  natural way with his two legs, bends them forward for the reasons
6 13|       Now no biped or quadruped bends his limbs like the figures
7 13|        well as his legs. For he bends his arms concavely and his
8 13| opposite, for example the elbow bends back, but the wrist of the
9 13|        wherefore also the ankle bends backwards, and the wrist