CHALLENGE THREE

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Across
  1. 4. THE MOST BASIC, INDEPENDENT UNIT OF LIFE
  2. 6. SYSTEM THAT CARRIES THE OXYGEN THAT CELLS NEED TO THE BLOOD
  3. 7. SYSTEM THAT PREPARES INGESTED FOODS SO THE CELL CAN USE THEM
Down
  1. 1. SUBSTANCES MADE FROM DEAD OR WEAKENED VIRUSES
  2. 2. ORGAN THAT SENDS BLOOD AROUND THE BODY
  3. 3. A RED LIQUID WHICH TRANSPORTS SUBSTANCES THROUGHOUT THE BODY
  4. 5. THE PROTEIN SHELL OF A VIRUS
  5. 8. SYSTEM THAT FIGHT VIRUSES