Circulatory System Crossword

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Across
  1. 2. Tiny blood vessels where materials are exchanged between blood and body cells
  2. 6. The muscular organ that pumps blood throughout the body
  3. 7. Blood vessels that carry blood toward the heart
Down
  1. 1. The fluid that transports oxygen, nutrients, and wastes throughout the body
  2. 3. Blood vessels that carry blood away from the heart
  3. 4. Blood cells that carry oxygen throughout the body
  4. 5. Blood cells that help protect the body from infections