Writing Resources
The respiratory tract is divided into 2 main segments Upper respiratory tract and lower respiratory tract The upper respiratory tract includes nose nasal cavity sinuses and pharynx while the lower respiratory tract includes larynx trachea bronchi and lungs Also I have understood more about how the structure of each part of the respiratory system helps to ensure us to respire smoothly and how the inhaling and exhaling of air takes place During inhalation the external intercoastal muscle contract and the internal intercoastal muscle relax Diaphragm will contract and flattens ribs will move up and out This will result in the volume of thorax increases and the intrapulmonary pressure to be lower than the atmospheric pressure Air will move from the higher pressure which is the atmosphere to the lower pressure which is the lungs The air inhaled will enter through the nose and into the nasal cavity
