Following are the parts of upper respiratory system i) External nares ii) Nasal cavities iii) Internal nares iv) Nasopharynx v) Larynx vi) Trachea Choose the correct answer from the options given below:

Step-by-step solution

The human respiratory system is anatomically divided into the upper and lower respiratory tracts. The upper respiratory system includes the structures located outside the chest cavity, which are the external nares, nasal cavities, internal nares, and the pharynx (including the nasopharynx). The lower respiratory system includes the structures located within or entering the chest cavity, which are the larynx, trachea, bronchi, bronchioles, and lungs. Therefore, external nares (i), nasal cavities (ii), internal nares