title: Observations about the intervalvular nodules of the semilunar valves, aortic and pulmonary, in the hearts of birds.
mesh_terms: D000818:Animals; D001021:Aortic Valve / Q000166:cytology*; D001717:Birds / Q000033:anatomy & histology*; D002356:Cartilage / Q000166:cytology; D002645:Chickens; D010856:Columbidae; D004372:Ducks; D005777:Geese; D011664:Pulmonary Valve / Q000166:cytology*; D013045:Species Specificity; D014422:Turkeys