| A | B |
|---|
| vertebra | the small bones that make up the backbone |
| compact bone | hard, dense bone |
| spongy bone | light-weight bone with many pore spaces |
| marrow | soft connective tissue found in center of some bones |
| red bone marrow | produces red blood cells |
| yellow marrow | stores fat |
| cartilage | a flexiable connective tissue found at the end of many bones |
| joint | a place where two bones meet |
| immovable joint | joints that allow little or no movement |
| movable joint | joints that allow movement |
| ligament | strong connective tissue that connects one bone to another |
| osteoporosis | condition where the bones become weak and brittle due to mineral loss |
