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.
Smell and the Structure of the Nasal Cavity Inside your nose is an open area called the nasal cavity. On the roof of the nasal cavity are special sensory cells called olfactory receptor cells. They extend through small holes in the bony roof of the nasal cavity (the ethmoid bone of the skull). This sieve-like structure is called the cribriform plate.