Arteries generally carry oxygen-rich blood.
Arterial blood pressure arteries conduct blood away from the heart.
Blood going away from the heart is generally oxygen-rich.
What is generally true about blood going away from the heart?
  - The bending of a ray of light
  - it is 99% water
  - A compound that donates proton
  - To another location like underground
  - it is usually low in oxygen
  - it can be seen
  - it has no hemoglobin
  - it is usually oxygen-rich