The paranasal sinuses and their site of drainage into the nose Name of sinus Site of drainage Frontal sinus Mid. meatus via infundibulum Maxillary sinus Mid. meatus through semilunar hiatus Sphenoid sinus Sphenoethmoidal recess Ethmoidal sinuses anterior group Mid. meatus middle group Mid. meatus posterior group Sup. nasal meatus Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan UniversityCopy Right- Hongqi ZHANG-Department of Anatomy-Fudan University Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University The paranasal sinuses and their site of drainage into the nose Name of sinus Site of drainage Frontal sinus Mid. meatus via infundibulum Maxillary sinus Mid. meatus through semilunar hiatus Sphenoid sinus Sphenoethmoidal recess Ethmoidal sinuses anterior group middle group posterior group Mid. meatus Mid. meatus Sup. nasal meatus