1. Respiratory System

2. Organs of the Respiratory System
Nose (external nares)
Nasal cavity
Pharynx
Larynx
Trachea
Bronchi (and their smaller branches)
Lungs (alveoli
Muscles ? (diaphragm and intercostals)

5. Nose Airway Moistens and warms air Filters and cleans inspired air
Resonating chamber for speech
Houses olfactory receptors
Septum divides into 2 nares

6. Pharynx (throat) Air tube Naso, oro, laryngopharynx
Hyaline cartilage holds it open
Skeletal muscle

7. Larynx Voice box (vocal cords) Open airway
Switching mechanism to rout food and air to their proper channels
Thyroid cartilages (Adam’s apple)

8. Trachea (windpipe) Epiglottis: cartilage flap
Glottis: opening to trachea

9. Bronchi
Branching air tubes to the lungs
Bronchioles: tiniest

10. Bronchioles

11. Alveoli: Air sacs for gas exchange

12. Lungs Paired Pleura: double layered serosa
Alveoli: microscopic sacs for gas exchange

13. Respiratory Physiology
2 phases
1. inspiration: air flows into lungs
2. expiration: air flows out of lungs
Intrapulmonary/intrapleural pressure keeps alveoli open