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134562b. You do this when you catch a cold.d. The smallest bone in the human body lies here.f. The framework of bones.Know Your Body15c. I am the largest solid organ in the body.e. I have 29 major and minor bones, and 34 muscles.The human heart beats more than three billion times in an average lifespan.File-O-FactThere are many parts in our body that work together.Match the riddles with the pictures by writing the correct letters in the circles.a. You may find it if you smile. It is the hardest substance in the human body.Unit 3: Science and TechnologyLiverToothStapesCoughingSkeletal SystemHand26