- Science
- The bones and muscles
- Age 8-10
-
level: Grade 3
- English
คำแนะนำของผู้เขียน
Some bones have to be recognized. The movement of muscles on which one contracts and which one relaxes when your arm moves.
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คำแนะนำของผู้เขียน
Some bones have to be recognized. The movement of muscles on which one contracts and which one relaxes when your arm moves.