The Chiari network and the valve of the inferior vena cava.
D018376:Cardiovascular Abnormalities; D006321:Heart / Q000033:anatomy & histology*; D006331:Heart Diseases; D006801:Humans; D014682:Vena Cava, Inferior; D014684:Venae Cavae / Q000033:anatomy & histology*
HEART/anatomy and histology; VENAE CAVAE/anatomy and histology