Presentation is loading. Please wait.

Presentation is loading. Please wait.

Respiratory System. Cellular Respiration Respiration Involving Gas Exchange.

Similar presentations

Presentation on theme: "Respiratory System. Cellular Respiration Respiration Involving Gas Exchange."— Presentation transcript:

1 Respiratory System

2 Cellular Respiration Respiration Involving Gas Exchange

3 General Functions of the Respiratory System A. Area for gas exchange B. Moves air C. Protects respiratory surfaces D. Provides nonspecific defenses E. Produces sounds F. Provides olfactory sensations

4 Components of the Respiratory System Nose and nasal cavity Pharynx (Throat) Larynx (Voicebox) Trachea (Windpipe) Lungs

5 The Nose: Structure Hair Mucous membranes Nasal conchae Olfactory epithelium

6 The Nose: Function Keeps out large particles Moistens and filters air Traps debris and pathogens Houses olfactory receptors

7 The Pharynx: Structure Lined with Mucous Membranes 3 regions: Nasopharynx Oropharynx Laryngopharnx

8 The Pharynx: Function Warms and moistens air Passageway for air and food Resonating chamber for sounds Houses tonsils

9 The Larynx: Structure Cartilages Mucous Membrane Glottis Vocal cords

10 The Larynx: Function Passageway for air Trap foreign particles Produce sound Posterior view

11 Vocal cords producing sound at 3 different pitches 120 Hz 160 Hz 200 Hz

12 The Trachea: Structure Epithelium Tracheal Cartilages Trachealis Muscle

13 The Trachea: Function Passageway for air Trap foreign particles Protect airway and keep it from collapsing

14 Lungs: Structure Primary Bronchi Secondary Bronchi Tertiary Bronchi Bronchioles Alveoli

15 Bronchioles

16 LE 22-5b Oxygen-rich blood Blood capillaries Alveoli Oxygen-poor blood Bronchiole Alveoli



19 Pulmonary Ventilation (Breathing)

20 LE 22-7a Rib cage expands as rib muscles contract Air inhaled Rib cage gets smaller as rib muscles relax Air exhaled Diaphragm Diaphragm contracts (moves down) InhalationExhalation Diaphragm relaxes (moves up)

21 Pulmonary Ventilation Diaphragm Lungs Trachea

22 Ventilation (Breathing)

23 Factors Affecting Pulmonary Ventilation 1.CO 2 2. pH

24 LE Pons Medulla Breathing control centers stimulated by: CO 2 increase/pH decrease in blood Nerve signals indicating CO 2 and O 2 levels CO 2 and O 2 sensors in aorta Nerve signals trigger contraction of muscles Diaphragm Rib muscles

25 Gas Exchange LE 22-9 Alveolar epithelial cells Air spaces CO 2 O2O2 Alveolar capillaries of lung CO 2 -rich, O 2 -poor blood O 2 -rich, CO 2 -poor blood Heart Tissue capillaries CO 2 O2O2 O2O2 Interstitial fluid Inhaled airExhaled air Tissue cells throughout body Internal Respiration External Respiration

26 Animations on Internal and External Respiration

27 Gas Transport of Oxygen LE Iron atom Polypeptide chain Heme group O 2 loaded in lungs O 2 unloaded in tissues O2O2 O2O2

28 Gas Transport of CO 2 7% dissolved in plasma 23% bound to hemoglobin 70% converted to carbonic acid (which dissociates into H + and HCO 3 - )

29 Spirometer

30 Simple Spirometer Used in Lab

31 Lung Volumes & Capacities

Download ppt "Respiratory System. Cellular Respiration Respiration Involving Gas Exchange."

Similar presentations

Ads by Google