PPT-Elasticity of Lungs, Compliance, Alveolar Surface Tension, Pulmonary Surfactant

Lecture 4 DrZahoor Ali Shaikh 1 Elastic Behavior Of The Lungs Elastic Behavior of the lungs is due to elastic connective tissue and alveolar surface tension During Inspiration lungs expand. Large organic compounds which are responsible for catalyzing biochemical reactions, as well as providing . structure, mobility, . and . function . for cells.. What is surface tension?. Have you ever seen one of these insects? The . Imrana. . Ihsan. Change in lung volume for each unit change in . transpulmonary. pressure. = stretchiness of lungs. Transpulmonary. pressure. is the . difference in pressure between alveolar pressure and pleural pressure.. 4 distinct events. Pulmonary ventilation. : air is moved in and out of the lungs. External respiration. : gas exchange between blood and alveoli. Respiratory gas transport. : CV system transports oxygen and carbon dioxide between lungs & tissues (discussed in Blood chapter). Imrana. . Ihsan. Change in lung volume for each unit change in . transpulmonary. pressure. = stretchiness of lungs. Transpulmonary. pressure. is the . difference in pressure between alveolar pressure and pleural pressure.. Review -- Muscle Elastic and Active Forces. Static Measurement of Compliance Curves. The Compliance of an Air-Filled Lung. The Compliance of a Saline-Filled Lung. Tissue Elastance in the Lung. Compliance of the Lung In Different Disease States. the . mediastinum. . site . of vascular and bronchial attachments. . anterior. , lateral, and posterior surfaces . Lungs. Apex: . . Base: . inferior . surface that rests on . _. . on . mediastinal. structure, mobility, . and . function . for cells.. What is surface tension?. Have you ever seen one of these insects? The . Gerridae. family (or Water Strider) takes advantage of surface tension.. Intermolecular forces between the molecules in the bulk experience equal pull on all sides, resulting in a net force of zero. However, molecules at the surface (or interface) experience a significantly greater “pull” from the molecules below them in the liquid than from the gas molecules above them. The net force results in a “pull” towards the bulk liquid (known as surface tension).. Ch 22 The Respiration System *** MOVE LECTURE TEST BACK ONE DAY TO NOV. 29 *** 1 ½ DAYS OF LECTURE Students: 10, 3 to read Instructor: 5 The Respiration System I. Overview A. Major Function Loai Gaffer. Functional Anatomy. The respiratory system includes the lungs and a series of airways that connect the lungs to the external environment. structures of the respiratory system are subdivided . Lecture : 10. Dr. . Shaimaa. . Munther. . Physiology of the Respiratory system. Overview . Respiration, includes two processes:. External respiration,. the absorption of O2 and removal of CO2 from the body as a whole. The ease with which lungs & thoracic wall can be expanded.( extent to which lung will expand for each unit increase in . transpulmonary. pressure. . Compliant lungs are easy to distend. .  Compliance is determined by (2 factors in which compliance related: elasticity of the lungs and surface tension in the alveoli):. 2020 03 05. Semmelweis . University, Budapest. Dr. . Nandor. Nagy . Extrapulmonar. :. Nasal. . cavity. - . nasopharynx. Larynx. Trachea. Intrapulmonar. :. Bronchi. : . principal. . lobar. . Functions of Respiratory System . Provides enormous Surface area for . gas exchange. . between alveoli and circulating blood.. Helps . regulate pH. of body fluids.. Permits vocal . sounds. .. External nares. 26.6.12. Surface Tension. Temperature. Solute. Solutes can have different effects on surface tension depending on their structure:. Little or no effect, for example sugar. Increase surface tension, inorganic salts.