PLEASE HELP I WILL GIVE BRAINLIEST TO THE FIRST CORRECT ANSWER!!!!!

Why does the circulatory system contain valves?

A. To stop blood flow.
B. To reverse blood flow.
C. To keep blood flowing in one direction.
D. To separate blood vessels from each other.

Respuesta :

Answer: The main job is to transport and propel throughout the body so the msot logical answer would be C

Explanation:

C is the correct answer