With any other cation, you get salts-for example, sodium sulfate (Na 2 SO 4) - which are mostly solids. It will take you a while to get familiar with all the possibilities, but for now, -ate or -ite indicating a salt and a solid will be the right answer most of the time. Logged.
The piriform sinus is contained in the hypopharynx, which is located between the hyoid bone and cricoid cartilage where the voice box begins.
The sphenoid sinus is the most posterior paranasal sinus. It is found superior to the nasopharynx, just anterior and inferior to the sella turcica and posterior to the posterior ethmoid cells. The sphenoid ostium can be seen medial to the superior turbinate and posterior to the basal lamella.