A year of study is two semesters of study in the same or related subject area. In general, the course is about 50 minutes per day, five days a week, for two semesters. However, local school districts determine the actual organization of instructional time depending on their master schedule.
Medical Definition of middle meatus. : a curved anteroposterior passage in each nasal cavity that is situated below the middle nasal concha and extends along the entire superior border of the inferior nasal conchaâcompare inferior meatus, superior meatus.
The sinuses are air filled cavities located in the face and around the nose. The sinuses are named according to the bone in which they are located. There are four paired sinus cavities. The maxillary sinuses are located in each cheek bone.