crossword

123456
Across
  1. 2. the control center of the cell
  2. 3. a common virus that affects the nose and throat
  3. 5. a storage space for a cell
  4. 6. the smallest functional organism
Down
  1. 1. A type of cell that is made in the bone marrow and found in the blood
  2. 4. a new virus never seen before