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Upper Respiratory Tract (URT), Lower Respiratory Tract (LRT) - Coggle…
Upper Respiratory Tract (URT)
Pharynx
Nasopharynx
Oropharynx
food and air pass
obstruction leads to immediate cessation of ventilation
Laryngopharynx
when foreign substances - cough reflex
Larynx
Lower Respiratory Tract (LRT)
Trachea
Carina
Trachea Bronchi
Bronchioles
Alveolar duct
Alveoli
cup shaped, thin walled structures.
Alveolar Sac
lined with simple epithelium.
two types of alveolar cells
Type I (90%)
Type II (produce surfactant) 10%
an increase in smooth
muscle and elastic fibers
Bronchospasm can cause contraction of the smooth muscle which narrows the bronchioles and impairs airflow
Each primary bronchus (and pulmonary arteries, veins and lymph vessels) enter the lungs through a slit could the hilus.
has very sensitive mucosa and will initiate violent coughing if irritated e.g. suction catheter
Connects the larynx with the major bronchi of the lungs