Schematic of the mid-sagittal plane of the mouse skull and ... Cerebrospinal fluid drains from the brain and into the nasal cavity through a bony plate known as the cribriform plate.

a: Midline sagittal view. b: Posterior view of the ... The esophagus and pharynx have been opened to show the connections of the nasal cavity, oral cavity, larynx, and esophagus into the pharynx.