空窍orifice
窍闭orifice block
回盲瓣口orifice of ileocecal valve【解剖】;ostium valvae ileocecalis【解剖】
肛门anal orifice(=anus)
瓣口反流面积regurgitant valve orifice area
足窍阴Foot Orifice Yin1
廷孔court orifice
阑尾口orifice of vermiform appendix【解剖】;ostium appendicis vermiformis【解剖】