Elastic Cartilage The epiglottis is an elastic cartilage structure at the base of the tongue that folds over the glottis when swallowing to avoid food or fluids from reaching the trachea. Elastic cartilage is identical to hyaline cartilage, but it has a dense network of branching elastic fibers in its matrix.
Simple Squamous Epithelium The small, sacs known as alveoli found throughout the lungs are lined by Simple Squamous Epithelia. Alveolar epithelial cells I (AEC I) occupy around 95% of the alveolar surface area and participate in exchange of gases. Alveoli transport oxygen from the respiratory system to the blood and CO2 from the blood back to the pulmonary tract. Because of the regenerating potential of AEC II, they contribute to lung defense.
Ciliated Pseudostratified Columnar Epithelium In the trachea and bronchi, the epithelium lining it is pseudostratified which largely comprises of three cell types: cilia, goblet, and basal cells. The cilia are found across the apical surface to help mucus move through the respiratory tract.
Elastic Cartilage The epiglottis is an elastic cartilage structure at the base of the tongue that folds over the glottis when swallowing to avoid food or fluids from reaching the trachea. Elastic cartilage is identical to hyaline cartilage, but it has a dense network of branching elastic fibers in its matrix.
Simple Squamous Epithelium The small, sacs known as alveoli found throughout the lungs are lined by Simple Squamous Epithelia. Alveolar epithelial cells I (AEC I) occupy around 95% of the alveolar surface area and participate in exchange of gases. Alveoli transport oxygen from the respiratory system to the blood and CO2 from the blood back to the pulmonary tract. Because of the regenerating potential of AEC II, they contribute to lung defense.
Ciliated Pseudostratified Columnar Epithelium In the trachea and bronchi, the epithelium lining it is pseudostratified which largely comprises of three cell types: cilia, goblet, and basal cells. The cilia are found across the apical surface to help mucus move through the respiratory tract.
More at: https://bioscience.lonza.com/lonza_bs/PH/en/what-are-airway-cells-and-their-function#:~:text=Therespiratoryepitheliumintrachea,mucusacrosstheairwaytract. https://histologyguide.com//slideview/MH-038-039-epiglottis/05-slide-1.html