associated structures of the respiratory system
The human respiratory system is composed of the nasal passages, the pharynx, larynx, the trachea, bronchi, and the lungs. It is responsible for the process of respiration that is vital to the survival of living beings.Respiration is the process of obtaining and using oxygen, while eliminating carbon dioxide.he human respiratory system is composed of the nasal passages, the pharynx, larynx, the trachea, bronchi, and the lungs. It is responsible for the process of respiration that is vital to the survival of living beings.