Capillaries
Valves?
a valve
Flaps of tissue that force unidirectional flow are called valves.
they're called valves. they are found in veins and also in the heart. hope this helped!
They are called valves, or leaflet valves in the veins, that interlock to prevent backflow of the blood.
These are valves, and are found in veins to prevent blood from flowing backwards.
Both types of semilunar valve, aortic and pulmonary, have three cusps. These flaps make sure that blood only flows in one direction.
valves
Valves. Mitral and aortic.
In veins, there are valves that prevent back flow. <><><><><> There are also valves in the heart to force the blood to go in one direction only when the heart contracts.
cusps
There are bivalves in the human cardiovascular system have two "flaps" that help move the blood in one direction and prevent it from flowing back in the incorrect direction.