Flashcards in Respiratory System Deck (12):
Describe the basic construction of the lung—lobes, segments, pleura, and branching of the conduction and
There are 5 total lobes of the lung (occasionally you may find an accessory lobe or 2), the 2 upper lobes, the 2 lower lobes and the right middle lobe. Each is supplied by respective lobar bronchi and pulmonary arteries. Pulmonary veins and lymphatics drain from the acini
Conduction systems: Trachea, Bronchi, Bronchioles
Vascular systems: Respiratory bronchioles, Alveolar ducts, Alveoli
Describe the relationship of the visceral and parietal pleura to ventilation.
Movement of the lungs within the thoracic cavity
during inspiration and expiration is facilitated by the pleural
space. The pleural space is created by the apposition of the inner lining of the chest wall, the parietal pleura, and the outer lining of the lung, the visceral pleura. A thin film of fluid separates the visceral and parietal pleura and
acts as a lubricant.
Visceral: Comprised of elastic fibrocollagenous tissue embedded with small amounts of smooth muscle, and
contains nerves, lymphatics and blood vessels, covered by a surface layer of mesothelial cells.
Parietal: Lies against connective tissue that is continuous with the periosteum of the ribs and connective tissue of the intercostal muscles
Explain the flow of blood through the lung, both the pulmonary and bronchial systems.
Identify a blood vessel (as compared to a bronchus or bronchiole) in the lung
Identify the layers of the walls of the conduction system and the functional reasons for their differences, including the trachea, bronchi, bronchioles, and the respiratory bronchioles.
Describe the structure of alveolar septa, and the functions of their cellular and acel lular components
Outline the various defense mechanisms, both in the conduction system and alveoli, that prevent infection.
Decribe the basic process of gas exchange at the blood-air barrier, the importance of surfactant, and identify the
layers of th layers of the blood-air barrier
State the underlying mechanisms for pathologies of cystic fibrosis
State the underlying mechanisms for pathologies of Kartagener’s syndrome
State the underlying mechanisms for pathologies of black lung