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Bones form the scaffolding that hold the body together and allow it to move. They also help protect vital organs, store minerals, and provide an environment for creating bone marrow. By adulthood, ...

The human skeleton — our internal framework that includes bones and cartilage — evolved over millions of years. It comprises an axial skeleton, which consists of the skull and the spine, as well as an ...

Skeletal muscles work in pairs to move the body. When you bend your arm, the biceps muscle contracts while the triceps relaxes. The biceps pulls the bones together, bending the arm. The reverse ...