Use quantity of before singular or plural things you can measure. Use number of before plural things you can measure. There are subtle differences between amount of, quantity of and number of. The term amount of is used for things you cannot measure (See non-countable nouns).ESS AND FEWER. Amount of should be used with a singular word, and number of should be used with a plural word. Similarly, less should be used before a singular word, and fewer should be used with a plural word. See the lesson Less and fewer.
The nasal septum is the wall between the nostrils that separates the nasal passages. The septum is made of cartilage and thin bone. If the nasal septum is crooked, it is called a deviated nasal septum. A deviated septum may be caused by injury or surgery to the nose. A deviated nasal septum may not cause symptoms. When present, symptoms may include a crooked nose, trouble breathing through the nose (especially on one side), or a runny nose.
Understanding A Deviated Septum. The septum is a thin barrier that is made up of cartilage that separates the two nostrils. Generally the septum is thought to be located midway between the two areas, dividing them equally. A deviated septum occurs when this partition is off-center, shifting prominently to one side.