Across
- 7. makes up the tunica intima
- 8. take blood away from the heart
- 10. connect veins and arteries (very small)
- 12. the open space the blood flows through
Down
- 1. smallest veins
- 2. smallest arteries
- 3. Tunica ____ (in the middle)
- 4. carry blood back to the heart
- 5. Tunica ____ (internal)
- 6. ____ arteries are closest to the heart
- 7. Tunica ____ (external)
- 9. the capillary walls are very ____
- 11. caused by vitamin C deficiency