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