Fact 1: Arteries generally carry oxygen-rich blood.

Fact 2: Arteries regulate blood pressure.

Given the two facts above, answer the question "what are arteries?" with the following options: 
- pressure regulated
 - to move people
 - the body's largest organ
 - solid, liquid, gas
 - matter vibrating
 - layers of fat
 - principals of aerodynamics
 - it keeps an organism warm


 

 pressure regulated        