components of the respiratory system lungs
In fact, the system is composed of the following biological structures: nose and nasal cavity, mouth, pharynx, larynx, trachea, bronchi and bronchioles, lungs and the muscles of respiration. (1). A properly functioning respiratory system is a vital part of our good health.. The nose and nasal cavity constitute the main external opening of the respiratory system. They represent the entryway to the respiratory tract â a passage through the body which air uses for travel in order to reach the lungs.