Body Movements - Chapter Wise CBSE Solved Question and Answer Based On NCERT
Long Q&A:
Q1: How muscles work in movement of bones?
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Ans:
When contracted muscles become shorter, stiffer and thicker. It pulls the bones. To move the bone in opposite direction, the relaxed muscle contracts to pull the bone towards it original position, while the first relaxes. Thus muscles work in pair to move the bone.
Q2: How fish swims?
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Ans:
The body of fish is streamlined. The skeleton of fish is covered with strong muscles. During swimming the muscles make the front part of body to one side and tail swings towards opposite side. Then quickly the body and tail are curved to other side. This makes a jerk and pushes body forward.
