[On age-connected changes in the venous valves of the lower extremities].
D000375:Aging; D006801:Humans; D007866:Leg / Q000098:blood supply*; D035002:Lower Extremity; D014680:Veins / Q000033:anatomy & histology*; D055422:Venous Valves
AGING; LEG/blood supply; VEINS/anatomy and histology