Tim Taylor is a senior writer at Innerbody Research focusing on human anatomy and physiology. Tim earned both his Bachelor of Science degree in Biology and his Master's degree in Teaching from the University of Pittsburgh.
The valves of veins are small pieces of strong tissue which allow blood flow in one direction only. These valves are controlled by muscle contractions.
Copyright © Innerbody Research 1997 - 2025. All Rights Reserved.
Innerbody Research does not provide medical advice, diagnosis, or treatment. You must consult your own medical professional.