2. Fill in the Blank. Place all answers in the box below.
1. The inner cavities of bones are filled with _______________.

2. The hard, outside part of a bone is called _______________ tissue.

3. The spongy, inner tissue of a bone is called _______________ tissue.

4. Red blood cells are formed in the __________ marrow of bones.

5. The bones are operated by ______________ to produce body movements
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