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Lines most of the conducting zone of the respiratory system. Formed of 5 types of cells: 1. Ciliated columnar cells: The most common type with hundreds of cilia on its apical surface. They also possess microvilli. Fig.2: Cilia (C), and some microvilli (MV), on the apical surface of the columnar cells of the respiratory epithelium.
What we’ll talk about... Histological structures of conducting airways. Histological structures that facilitate gas exchange. Properties of alveoli that control ventilation. Macrophages and handling of foreign particles. Rate of gas diffusion between air and blood is related to the surface area and thickness of the interface. Air. Blood. O2.
Development of the lung and pleura. The epithelial components of the lung are derived from the endoderm, while the cartilageous, muscular, and connective components come from the surrounding splanchnic (visceral) mesoderm. The lungs expand in the pleural cavities surrounded by the parietal and visceral pleura.
Objectives. The histologic characteristics of the components of conducting portion and respiratory portion of the respiratory system. How these characteristics allow each component to contribute to the overall function of the respiratory system. Ref code # 8.
Bronchus and bronchioles are present. Alveolar duct and alveoli-. -Simple squamous epithelium. Type 1 Pneumocytes(97%. -Blood Air barrier. Type2 Pneumocytes(2%) - pulmonary surfactant. - lamellar bodies. Type3Pneumocytes (brush cells) -Macrophages or Dust cells.
18 Ιουν 2009 · Abstract and Figures. The lung is uniquely designed to accomplish its major functions of movement of air and the delivery of oxygen to and removal of carbon dioxide from the circulation.
The respiratory system contains a proximal conducting portion that connects the exterior of the body with the distal respiratory portion where exchange of gases between air and blood occurs. The conducting portion, which consists of the nasal cavities, pharynx, larynx, and
