The fibrous ring of the pulmonary valve that attaches the cusps of pulmonary valve to the wall of right ventricle, and which consists of portions of the fibrous scallops of the anterior, right posterior and left posterior cusps [ MP:0010606 ]

Synonyms: fibrous ring of pulmonary valve pulmonary anulus anulus of pulmonary valve pulmonary valvar anulus

This is just here as a test because I lose it