Na Quotes: Although the outsides of a bone are hard, they are generally light and soft inside. They are about 75% water. ...

Although the outsides of a bone are hard, they are generally light and soft inside. They are about 75% water. (Na)

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Na Quotes: Although the outsides of a bone are hard, they are generally light and soft inside. They are about 75% water.

Na Quotes: Although the outsides of a bone are hard, they are generally light and soft inside. They are about 75% water.

Na Quotes: Although the outsides of a bone are hard, they are generally light and soft inside. They are about 75% water.

Na Quotes: Although the outsides of a bone are hard, they are generally light and soft inside. They are about 75% water.

Na Quotes: Although the outsides of a bone are hard, they are generally light and soft inside. They are about 75% water.

Na Quotes: Although the outsides of a bone are hard, they are generally light and soft inside. They are about 75% water.

Na Quotes: Although the outsides of a bone are hard, they are generally light and soft inside. They are about 75% water.

Na Quotes: Although the outsides of a bone are hard, they are generally light and soft inside. They are about 75% water.

Na Quotes: Although the outsides of a bone are hard, they are generally light and soft inside. They are about 75% water.

Na Quotes: Although the outsides of a bone are hard, they are generally light and soft inside. They are about 75% water.

Na Quotes: Although the outsides of a bone are hard, they are generally light and soft inside. They are about 75% water.

Na Quotes: Although the outsides of a bone are hard, they are generally light and soft inside. They are about 75% water.

Na Quotes: Although the outsides of a bone are hard, they are generally light and soft inside. They are about 75% water.

Na Quotes: Although the outsides of a bone are hard, they are generally light and soft inside. They are about 75% water.

Na Quotes: Although the outsides of a bone are hard, they are generally light and soft inside. They are about 75% water.