Skeletal system

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Across
  1. 3. a fluid-filled sac or sac like cavity. especially are countering friction at a joint
  2. 4. a bone cell, formed when an osteoblast becomes embedded in the matrix it has selected
  3. 5. a short band of tough, flexible fibrous connective tissue which connects two bones or cartilage
  4. 7. a structure in the human or animal body at which two parts of the skeletal are fitted together
Down
  1. 1. a soft fatty substance in the cavities of bones, in which blood cells are produced
  2. 2. a firm, elastic, flexible type of connective tissue of a translucent whitish or yellowish color ; gristle
  3. 6. a flexible structure but in elastic cord of strong fibrous collagen tissue attaching a muscle to a bone