Objective33: Describe thr Role of Skeletal Muscle Contractions and Venous Valves in Returning Blood to the Heart

This page in the textbook showed me how skeletal muscle works with the vessels to return blood to the heart. It illustrates the direction of flow, open and closed valves, and the contracted skeletal muscle used to return blood to the heart. It reminds me of pumping water through a fire hose. The longer the hose line is the more pressure is needed to reach the designated target. As the blood gets further away from the heart, it needs help from skeletal muscle to reach its destination(the heart). The veins also have valves to prevent the back flow of blood.