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 . Teka Siebenaler RRT. Cardiopulmonary Services . University of Minnesota . Amplatz. Children’s Hospital. Fetal Lung Stages of Development. Embryonic Stage 3. rd. -8. th. week. Neural Tube closure. “Air Sacs”. Resemble bunches of grapes. Make up bulk of lungs. Respiratory Zone. Includes respiratory bronchioles, alveolar ducts, alveolar sacs, and alveoli. Only places where gas exchange occurs. 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).. PULMONARY FUNCTION & RESPIRATORY ANATOMY KAAP310 Respiratory Anatomy Larynx Hyoid bone Thyroid cartilage Lateral cricothyroid ligaments Cricoid cartilage http://apbrwww5.apsu.edu/thompsonj/Anatomy%20&%20Physiology/2020/2020%20Exam%20Reviews/Exam%203/larynx%20figure.jpg PULMONARY EDEMA. 1. LECTURE NOTES BY:. Dr. . Syed Mohammad Zub. air. MBBS(KE) BS (PU) DHA (CCM) FWHO(UK) MBA;FACHE (US) M.PHIL (PHYSIOLOGY). Assist. Prof Physiology . KING EDWARD . MEDICAL. UNIVERSITY, Lahore.. 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. Dr. Marwa . majid. Aladhab. Homework. Case 1. Case 2. Case 3. Objectives . Anatomically, functionally and radiologically the lungs may be divided into two compartments:. 1. The interstitium: . soft tissue structures between the alveoli, and includes branching distal bronchi and bronchioles, accompanying arteries, veins and lymphatics, plus supporting connective tissue.. 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):. Brad Smith, PhD. University of Colorado Denver | Anschutz Medical Campus. Departments of Bioengineering and Pediatrics. Background and Vision. Background and Motivation. Acute respiratory distress syndrome (ARDS). 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.