Across
- 5. the system that has white blood cells that fight off diseases
- 6. the cells that carry oxygen to the rest of the body through blood vessels
- 7. the cells that fight off diseases and are apart of the immune system
- 8. smaller blood vessels that have the diameter of only one cell
Down
- 1. transports and keeps blood on the right track
- 2. the sac that holds urine
- 3. the system that helps get oxygen, hormones, blood, and nutrients to the rest of the body
- 4. the system that takes in oxygen and exhales carbon dioxide