<prompt> Venous return to hea during quiet standing is facilitated by all of the following factors, exceptCalfmuscle contraction during standingValves in perforatorsSleeve of deep fasciaGravitational ihcrease in aerial pressure  <response>: During quiet standing gravity act against venous return to the heaGravity induces peripheral pooling of blood in leg instead.Calf muscle contraction pushes the blood towards heavalves prevents backflowRef: Medical Physiology Indu Khurana 2015 edition pAge No:220 