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Across
  1. 3. Basic unit of matter. (4 letters)
  2. 6. Cell structures that carry out special functions in a cell.(9 letters)
  3. 7. A group of organs that work together to perform a specific function. (11 letters)
  4. 8. Element is part of organic molecules and makes four covalent bonds. (6 letters)
Down
  1. 1. Basic unit of structure & function in a living thing. (4 letters)
  2. 2. A bunch of tissues that carry out a specialized function of the body. (5 letters)
  3. 4. A group of similar cells organized to do a specific job. (6 letters)
  4. 5. Is made of two or more elements in a fixed ratio. (8 letters)
  5. 6. A living thing made of a group of organ systems. (8 letters)