The valve of the inferior vena cava.
D018376:Cardiovascular Abnormalities; D002319:Cardiovascular System; D035423:Thoracic Cavity; D014682:Vena Cava, Inferior; D014684:Venae Cavae / Q000033:anatomy & histology*
CARDIOVASCULAR DEFECTS, CONGENITAL; VENAE CAVAE/anatomy and histology