Cells, tissues, organs and systems

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Across
  1. 2. striated voluntary muscle that raises the arm
  2. 4. the matrix in which cartilage cells grow
  3. 6. carries nerve impulse to the cell of the neuron
  4. 9. top layer of skin, flat, thin cells
  5. 10. gap between 2 neurons
Down
  1. 1. bone cell
  2. 3. a collection of tissues that together perform a function
  3. 4. nutrient found in bone tissue
  4. 5. found in red blood cells to carry oxygen
  5. 7. a group of similar cells performing a function
  6. 8. used in blood clotting
  7. 11. a red blood cell does not have a ________