N Nikki New member Nov 25, 2010 #1 The one-way flow of blood in veins is maintained by The one-way flow of blood in veins is maintained by ______________. positive pressure from the chest cavity blood pressure muscles pressing against the veins their thick walls valves
The one-way flow of blood in veins is maintained by The one-way flow of blood in veins is maintained by ______________. positive pressure from the chest cavity blood pressure muscles pressing against the veins their thick walls valves
