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NCERT VI Social Sciences Answer the following: (a) What is a ball and socket joint? (b) Which of the skull bones are movable? (c) Why can our elbow not move backwards?

Answer» BALL  and socket JOINT  is a  moveable  joint .  ex:   shoulder..B.     only with the  help of   lower jaw  in skull  bones in movable.C.     HINGE JOINTS WHICH  ARE  ALLOWS   movement  BACK and front . so, we cannot   move  our elbow backword...


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