Fact 1: Blood pressure is highest in arteries and lowest in veins.

Fact 2: Blood Pressure Blood Pressure Blood pressure is the force of the blood on the artery walls.

Given the two facts above, answer the question "The what blood is highest in arteries and lowest in veins?" with the following options: 
- ligt
 - humans
 - sugar
 - liquid
 - glucose
 - CO 2
 - force
 - Man


 

       force  