1.7 Venous return

Question 1

what is venous return

Answer 1

the flow of the blood back to the heart via the veins and specifically the vena cava

Question 2

how does the skeletal muscle pump increase venous return

Answer 2

muscles contracting and relaxing are constantly changed shape so pushes on the nearby veins and pushes it back toward the heart

Question 3

how does the respiratory pump increase venous return

Answer 3

breathing in and out causes contractions in many muscles like the diaphragm. This causes a constant change in the pressure of the thoracic (chest) cavity, compressing the veins and causing venous return.

Question 4

how do pocket valves increase venous return

Answer 4

the valves close, in order to prevent backflow of blood throughout the veins

Question 5

other aids of venous return

Answer 5

smooth muscle, gravity

Question 6

aids of venous return

Answer 6

skeletal muscle pump, respiratory pump, pocket valves

Question 7

what is blood pressure

Answer 7

forcse exerted by the blood against the walls of the blood vessels

Question 8

what does exercise do to blood pressure

Answer 8

increases it