What mechanisms assist venous return?
A) One-way valves, increasing diameter of veins, peripheral resistance
B) Pressure changes during breathing, one-way valves, thickness of the tunica media in medium-sized veins
C) Skeletal muscle contractions, large-diameter lumen, thickness of the tunica media in medium-sized veins
D) One-way valves, skeletal muscle contractions, pressure changes during breathing

Question

Quizplus · Accepted Answer

One-way valves prevent backflow, skeletal muscle contractions squeeze veins and push blood toward the heart, and pressure changes during breathing assist in the movement of blood. These mechanisms collectively assist in venous return.

What Mechanisms Assist Venous Return