Respiratory tract

Respiratory System - an overview respiratory system Such structures include the nasal cavity, pharynx, larynx, trachea, and most of the bronchial tree The respiratory zone includes all the organs and structures immune system The respiratory system takes up oxygen from the air we breathe and expels the unwanted carbon dioxide

excretory system Oxygen in the air is inhaled and makes its way through the pharynx, larynx, trachea, large upper airways, conducting bronchioles, respiratory bronchioles, the