Biology puzzle

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Across
  1. 4. cubical shape epithelial cell are called ________.
  2. 5. organ system collectively form an ______.
  3. 6. perform a particular function.
  4. 9. _____ tissues.
  5. 11. ______ is a group of similar cell that work together
  6. 13. involuntary, cardiac muscles are examples of _______ tissues.
  7. 14. long shaped epithelial cell are called _________.
  8. 15. vascular, ground tissues are all _____
  9. 16. forms lining of all the objects like stomach, esophagus, mouth, intestine and trachea.
Down
  1. 1. of epithelial tissues are called ________.
  2. 2. muscular, connective, nervous tissues are
  3. 3. flattened epithelial cells are called _______.
  4. 7. of organs working together is called ________.
  5. 8. combine to form _______.
  6. 10. are about ______ muscles in our body.
  7. 12. do important work.
  8. 14. ______ is a lowest level of cellular organism.