The valves of the thoracic duct at the angulus venosus.
D000818:Animals; D001794:Blood Pressure; D004285:Dogs; D005260:Female; D006801:Humans; D007601:Jugular Veins / Q000033:anatomy & histology* / Q000502:physiology; D008196:Lymph; D008297:Male; D008365:Manometry; D012119:Respiration; D013897:Thoracic Duct / Q000033:anatomy & histology* / Q000502:physiology