Openings of the internal nose include the internal nares (choanae) and the ducts that connect to all paranasal sinuses.

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The internal nares, also known as choanae, are openings that connect the nasal cavity to the pharynx, and the ducts from the paranasal sinuses (frontal, ethmoidal, sphenoidal, and maxillary sinuses) also open into the nasal cavity, allowing for drainage and ventilation of the sinuses.

Openings of the Internal Nose Include the Internal Nares (Choanae)