GSU BIOL 2240 - Respiratory (26 pages)

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Respiratory



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Respiratory

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Pages:
26
School:
Georgia State University
Course:
Biol 2240 - Intro to Human Physiology
Intro to Human Physiology Documents

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Respiratory system Respiratory System Ventilation Movement of air in out of lungs External respiration Gas exchange oxygen and carbon dioxide between air in lungs and blood Internal respiration Gas exchange between the blood and tissues Anatomy of Respiratory System Upper tract nose pharynx and associated structures Lower tract larynx trachea bronchi lungs and the tubing within the lungs Trachea Windpipe from the larynx into the mediastinum Wall composed of C shaped rings of hyaline cartilage Respiratory zone respiratory bronchioles to alveoli Alveoli Nucleus of type I cell Surrounded by fine elastic fibers Alveolar pores contribute to recoil Contain open pores that connect adjacent alveoli Allow air pressure throughout the lung to be equalized Capillary Alveolus Type I cell of alveolar wall Macrophage Endothelial cell nucleus Red blood cell Alveoli gas filled in capillary Type II surfactantair spaces secreting cell 23 4 The Respiratory Membrane Three types of cells in membrane Type I pneumocytes 90 of surface of alveolus Gas exchange Type II pneumocytes Produce surfactant Dust cells phagocytes Nucleus of type I cell Alveolar pores Capillary Alveolus Type I cell of alveolar wall Macrophage Endothelial cell nucleus Respiratory Membrane Red blood cell Alveoli gas filled in capillary Type II surfactantair spaces secreting cell Layers of respiratory membrane 23 5 The Respiratory Membrane Layers of respiratory membrane Alveolar fluid w surfactant Alveolar epithelium Thin interstitial space Capillary endothelium Red blood cell Nucleus of type I cell O2 CO2 Capillary Alveolus Endothelial cell nucleus Alveolar epithelium Fused basement membranes of the alveolar epithelium and the capillary endothelium Capillary endothelium 23 6 Lungs Two lungs Thoracic cavity w in ribcage Base sits on diaphragm Right lung three lobes Lobes separated by fissures Left lung Two lobes and an indentation called the cardiac notch Covered by pleural membrane Pleura Muscles of Ventilation



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