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Respiration Involving Gas ExchangeCellular Respiration Respiration Involving Gas Exchange
General Functions of the Respiratory SystemA. Area for gas exchange B. Moves air C. Protects respiratory surfaces D. Provides nonspecific defenses E. Produces sounds F. Provides olfactory sensations
Components of the Respiratory SystemNose and nasal cavity Pharynx (Throat) Larynx (Voicebox) Trachea (Windpipe) Lungs
The Nose: Structure Hair Mucous membranes Nasal conchaeOlfactory epithelium
The Nose: Function Keeps out large particles Moistens and filters airTraps debris and pathogens Houses olfactory receptors
The Pharynx: StructureLined with Mucous Membranes 3 regions: Nasopharynx Oropharynx Laryngopharnx
The Pharynx: Function Warms and moistens airPassageway for air and food Resonating chamber for sounds Houses tonsils
The Larynx: Structure Cartilages Mucous Membrane Glottis Vocal cords
The Larynx: Function Passageway for air Trap foreign particlesProduce sound Posterior view
Vocal cords producing sound at 3 different pitches120 Hz 200 Hz 160 Hz
The Trachea: StructureEpithelium Tracheal Cartilages Trachealis Muscle
The Trachea: Function Passageway for air Trap foreign particles Protect airway and keep it from collapsing
Lungs: Structure Primary Bronchi Secondary Bronchi Tertiary BronchiBronchioles Alveoli
Alveoli Oxygen-poor blood Oxygen-rich blood Bronchiole Alveoli BloodLE 22-5b Alveoli Oxygen-poor blood Oxygen-rich blood Bronchiole Alveoli Blood capillaries
Pulmonary Ventilation (Breathing)
Rib cage gets smaller as rib muscles relax Rib cage expands asLE 22-7a Rib cage gets smaller as rib muscles relax Rib cage expands as rib muscles contract Air inhaled Air exhaled Diaphragm Diaphragm contracts (moves down) Diaphragm relaxes (moves up) Inhalation Exhalation
Pulmonary VentilationTrachea Lungs Diaphragm
Factors Affecting Pulmonary VentilationCO2 2. pH
Breathing control centers stimulated by:LE Pons Breathing control centers stimulated by: Medulla CO2 increase/pH decrease in blood Nerve signals indicating CO2 and O2 levels Nerve signals trigger contraction of muscles CO2 and O2 sensors in aorta Diaphragm Rib muscles
Gas Exchange External Respiration Internal Respiration Exhaled airInhaled air Gas Exchange Alveolar epithelial cells Air spaces CO2 O2 External Respiration Alveolar capillaries of lung CO2-rich, O2-poor blood O2-rich, CO2-poor blood Heart Tissue capillaries CO2 O2 Internal Respiration Interstitial fluid CO2 O2 Tissue cells throughout body
Animations on Internal and External Respiration
Gas Transport of OxygenLE 22-10 Gas Transport of Oxygen Iron atom O2 loaded in lungs O2 O2 unloaded in tissues O2 Heme group Polypeptide chain
Gas Transport of CO2 7% dissolved in plasma 23% bound to hemoglobin 70% converted to carbonic acid (which dissociates into H+ and HCO3-)
Simple Spirometer Used in Lab
Lung Volumes & Capacities
THE RESPIRATORY SYSTEM 1.THE FUNCTION OF THE RESPIRA- TORY SYSTEM IS TO CONDUCT AIR IN AND OUT OF THE LUNGS FOR GAS EXCHANGE. 2. AIR ENTERS THROUGH THE.
Copyright © 2003 a TBM production. All rights and lefts reserved Respiration: The Exchange of Gases Respiratory System.
The Respiratory System
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BIOLOGY CONCEPTS & CONNECTIONS Fourth Edition Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Neil A. Campbell Jane B. Reece Lawrence.
Copyright © 2005 Pearson Education, Inc. Publishing as Benjamin Cummings Chapter 22 Gas Exchange.
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The Respiratory System. System Overview Includes tubes that remove particles from incoming air and transport air in and out of the lungs Microscopic air.
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1.Respiration (external, internal, and cellular). 2.Production of sound (vocal cords). 3.Pulmonary ventilation. 4. Inspiration (intercostals muscles lift.
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Respiratory System. Lungs Lungs are lateral to the heart Each is located in its own enclosed pleural cavity within the thoracic cavity Each lung is covered.
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Be sure to check the absent folder if you have been absent! Last day to Make up Blood/Cardiovascular System Exam will be Wednesday. After that it will.
Respiratory System. Nose – produces mucus, warms, moistens, and filters air, and resonance chamber for speech Pharynx – passage way for air and food.
THE RESPIRATORY SYSTEM
The Respiratory System. Two Major Divisions Upper Respiratory Tract – nasal cavity, pharynx, and larynx * External Respiration – exchange of gases between.
The Respiratory System. Overview Respiratory System Function: exchange of oxygen and carbon dioxide with its environment. Structures: nose, passageways,
The Respiratory System Respiratory System: Breathe in and out…
Respiration The respiratory system brings air rich in oxygen into the body and gets rid of air rich in carbon dioxide.
Lesson 3 The Respiratory System Your lungs and chest expand like a balloon as you inhale. As you exhale, your lungs deflate slightly.
Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings The primary function of the respiratory system is to allow oxygen from the air.
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End Show Slide 1 of 37 Copyright Pearson Prentice Hall 37-3 The Respiratory System.
The beginning. Oxygen first enters your body and Carbon Dioxide leaves Air enters the nose and is filtered by tiny hairs called cilia, it is moistened.
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