By and UPDATED December 16, 2015. The Federal Reserve decided to raise short-term interest rates for the first time since the financial crisis. Officials said the economy was strong enough to keep growing with a little less help from the central bank.
Clinical Relevance: Sinusitis. As the paranasal sinuses are continuous with the nasal cavity, an upper respiratory tract infection can spread to the sinuses. Infection of the sinuses causes inflammation (particularly pain and swelling) of the mucosa, and is known as sinusitis. If more than one sinus is affected, it is called pansinusitis.
The posterior ethmoidal sinuses open out at the level of the superior meatus. The only structure not to empty out onto the lateral walls of the nasal cavity is the sphenoid sinus. It drains onto the posterior roof. In addition to the paranasal sinuses, other structures open into the nasal cavity. The nasolacrimal duct acts to drain tears from the eye â it opens into the inferior meatus. The auditory (or eustachian) tube opens into the nasopharynx at the level of the inferior meatus.