Blood is moved efficiently through the veins and back to the heart is by ____.
A) one way valves to prevent backflow
B) sphincter muscles to prevent backflow
C) contraction of the ventricles
D) contraction of the atria
E) blood pooling in the capillary bed

Question

Blood is moved efficiently through the veins and back to the heart is by ____.
A) ​one way valves to prevent backflow
B) ​sphincter muscles to prevent backflow
C) ​contraction of the ventricles
D) ​contraction of the atria
E) blood pooling in the capillary bed​

Quizplus · Accepted Answer

One way valves prevent the backflow of blood in the veins and ensure that blood is efficiently moved towards the heart. Sphincter muscles are not found in veins, and while the contraction of the ventricles and atria are important for overall blood circulation, they do not specifically facilitate movement through veins. Blood pooling in the capillary bed can actually decrease blood flow and lead to circulation issues.

Blood Is Moved Efficiently Through the Veins and Back to the Heart