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Copyright © 2006 by Elsevier, Inc. Mechanics of Respiration Inspiration Resting –Diaphragm Active –Diaphragm –External intercostal muscles Diaphragm
Copyright © 2006 by Elsevier, Inc. Mechanics of Respiration Inspiration Active –Diaphragm –external intercostals Spine External Intercostals ribs
Copyright © 2006 by Elsevier, Inc. Mechanics of Respiration Expiration Resting passive process elastic properties of lung Active Abdominals decrease chest volumes Active exhalation abdominal compression Active inspiration abdominal relaxation
Copyright © 2006 by Elsevier, Inc. Mechanics of Respiration Expiration Active Internal intercostals Internal Intercostals ribs Spine
Copyright © 2006 by Elsevier, Inc. Patm Palveolar Rest Inhalation due to expansion of chest cavity (Boyles law) Mechanics of Inhalation
Copyright © 2006 by Elsevier, Inc. Movement of Air In and Out of Lungs Pleural Pressures –Resting -5 cm H 2 0 –Inspiration -8 cm H 2 0 Alveolar Pressure –Resting 0 cm H 2 0 –Inspiration-1 cm H 2 0 –Expiration 1 cm H 2 0
Copyright © 2006 by Elsevier, Inc..50.25 0 +2 0 -2 -4 -6 -8 P r e s s u r e ( c m / H 2 O ) V o l u m e C h a n g e ( l i t e r ) Alveolar pressure Pleural pressure Transpulmonary Pressure Pressure and Volume Changes During Breathing Inspiration Expiration
Copyright © 2006 by Elsevier, Inc. Pulmonary Volumes Figure 37-6; Guyton & Hall
Anatomic Dead Space Low Blood Flow Physiologic Dead Space Definitions of Dead Space Copyright © 2006 by Elsevier, Inc.
Compliance of Lungs Determined by elastic forces Elastic forces –lung tissue –surface tension Lung Volume Change in Pleural Pressure Inhalation Exhalation -4 -8
Copyright © 2006 by Elsevier, Inc. Control of Bronchiolar Diameter Nervous –Sympathetics 2 receptors dilate –Parasympathetics Acetylcholine constrict Humoral –Histamine, acetylcholine » Constrict –Adrenergic ( agonists) » Relax
Copyright © 2006 by Elsevier, Inc. Airway Resistance during Forced Exhalation Guyton & Hall
The Respiratory system Pulmonary ventilation – Chp 16 Respiration.
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Respiration. How does respiration take place? There are two respiratory movements: Inspiration (inhalation) Expiration (exhalation) When you inhale, air.
Pulmonary Ventilation Dr. Imrana Ihsan. Copyright © 2007 Lippincott Williams & Wilkins. McArdle, Katch, and Katch: Exercise Physiology: Energy, Nutrition,
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The mechanics of breathing and Respiratory Volumes Pass and Merit.
Mechanics of Breathing. Events of Respiration Pulmonary ventilation – moving air in and out of the lungs External respiration – gas exchange between.
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Respiratory Physiology Part I BIO 219 Dr. Adam Ross Napa Valley College.
Chapter 37: Pulmonary Ventilation Guyton and Hall, Textbook of Medical Physiology, 12 edition.
POWERPOINT ® LECTURE SLIDE PRESENTATION by LYNN CIALDELLA, MA, MBA, The University of Texas at Austin Copyright © 2007 Pearson Education, Inc., publishing.
Respiration, Breathing Mechanics and Lung Function.
Human Anatomy and Physiology Physiology of air breathing The lungs.
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Second Edition Human Physiology Principles of PowerPoint ® Lecture Slides Prepared by Cindy Stanfield, University of South Alabama William J. Germann |
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Respiratory Physiology 1. Dr. Aida Korish Asst. Prof. Physiology KSU 2 Dr.Aida Korish.
Mechanics of Breathing Overview 1. Inspiration 2. Expiration 3. Respiratory Volumes.
Mechanics of Ventilation Prof. K. Sivapalan. Introduction 20132Mechanics of Ventilation.
Physiology of the Respiratory System. Objectives You will be able to… 1.Explain how air enters and leaves our lungs. Note: This covers all of the information.
Pulmonary ventilation: air is moved in and out of the lungs External respiration: gas exchange between blood and alveoli Respiratory gas transport:
Spirometry. Respiration External respiration – Gas exchange between blood and alveoli Internal respiration – Gas exchange between blood and tissue cells.
Pulmonary Ventilation Week 3. PulmonaryVentilation Pulmonary Ventilation Pulmonary ventilation, or breathing, is the exchange of air between the atmosphere.
Part II - Respiratory Physiology. 4 distinct events Pulmonary ventilation: air is moved in and out of the lungs External respiration: gas exchange.
RESPIRATORY PHYSIOLOGY Dr. Waheeb Alharbi. References (1) Physiological basis of medical practice. By; John B. West (2) Medical physiology By; Arthur.
Copyright © 2010 Pearson Education, Inc. Marieb Chapter 22: The Respiratory System Part A.
1 Respiratory system.. mechanics of breathing and PFTs….L2 Faisal I. Mohammed, MD, PhD Yanal A. Shafagoj MD, PhD University of Jordan.
ECAP BIOL The Respiratory System Mrs. Riel.
Respiration Xia Qiang, PhD Department of Physiology Zhejiang University School of Medicine
RESPIRATION. Gas exchange 4 tasks involved 1.Pulmonary ventilation 2.External respiration 3.Respiratory gas transport 4.Internal respiration.
Mechanism of respiration The movement of air into and out of lungs is brought about by changes in the size of the thoracic cavity, the lungs following.
UNIT B: Human Body Systems Chapter 8: Human Organization Chapter 9: Digestive System Chapter 10: Circulatory System and Lymphatic System Chapter 11: Respiratory.
Functions of the Respiratory system P6 M3. responsible The respiratory system is responsible for: – getting oxygen in to our body – Getting carbon dioxide.
Respiratory System Physiology. Respiratory Physiology All tissues receive adequate Oxygen supply Prompt removal of Carbon Dioxide Efficient regulation.
Respiratory Physiology. Overall function Movement of gases Gas exchange Transport of gas (oxygen and carbon dioxide)
TURN IN RESP. WORKSHEET IN BLUE BASKET. GET A BOOK. Monday, February 29, 2016.
Structure : Air conducting channels Respiratory spaces, 300 millions alveoli lungs float in the thoracic cavity + pleura.
Muscles Involved In Ventilation MuscleOriginInsertionAction Diaphragm Xiphoid process, inferior margin of rib cage and lumbar vertebrae Central Tendon.
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings Fundamentals of Anatomy & Physiology SIXTH EDITION Frederic H. Martini PowerPoint.
Physics of Respiration Boyle’s Law - the universal law of gases PV = nRT P 1 V 1 = P 2 V 2.
VENTILATION IN HUMANS (ie the mechanism of breathing)
Chapter 17 Mechanics of Breathing. About this Chapter The respiratory system Gas laws Ventilation.
RESPIRATORY PHYSIOLOGY. 5 Functions of the Respiratory System 1.Provides extensive gas exchange surface area between air and circulating blood 2.Moves.
Respiratory physiology Respiration is the process by which the body takes in and utilizes oxygen (O 2 ) and gets rid of carbon dioxide (CO 2 ).
Mechanism of Breathing Barasa Ambrose. 11-Jun-16Respiratory Movements2 Mechanical Factors in Breathing Air flows from region of high pressure to region.
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