英语释义
1. a conical prolongation of the right ventricle in mammals from which the pulmonary arteries emerge — called also conus
2. a prolongation of the ventricle of amphibians and some fishes that has a spiral valve separating venous blood going to the respiratory arteries from blood going to the aorta and systemic arteries
3. a conical prolongation of the right ventricle from which the pulmonary arteries emerge — called also conus