1. Respiratory System

2. Respiratory System Lungs & Air passages
Responsible for taking in oxygen and removing carbon dioxide (CO2)
4 – 6 minute supply of oxygen
Includes: nose, pharynx, larynx, trachea, bronchi, alveoli, and lungs

4. Nose 2 nostrils Nasal septum Nasal cavities
Lined with a mucous membrane
Rich blood supply
Air is warmed, filtered, and moistened

5. Nose Nasal cavities Mucous helps trap pathogens and dirt Cilia
Tiny hairlike structures in nasal cavity
Also trap dirt and pathogens as they enter nose so they can be pushed toward the esophagus and be swallowed
Olfactory receptors
Nasolacrimal ducts drain tears from the eye into the nose to provide additional moisture for the air

6. Sinuses Cavities in the skull around the nasal area
Connected to the nasal cavity by short ducts
Lined with mucous membrane that warms and moistens air
Also provide resonance for the voice

8. Pharynx Lies directly behind the nasal cavities Three sections
Nasopharynx
Upper section behind nose
Oropharynx
Middle section behind oral cavity
Laryngopharynx
bottom section
Branches to esophagus & trachea

10. Larynx Voice box (Adam's apple) Lies between the pharynx and trachea
Vocal cords
Opening between cords is called the glottis
Vocal cords vibrate and produce sound
Tongue and lips act on the sound to produce speech

12. Epiglottis Special piece of cartilage
Leaf like structure that closes the opening into the larynx during swallowing
Prevents food and liquids from entering the respiratory tract

13. Trachea Tube carries air between the pharynx and bronchi
Series of c-shaped cartilage

14. Bronchi Two divisions of the trachea near the center of the chest
Each bronchus enters a lung
Smaller branches are called bronchioles
End in air sacs called alveoli

16. Alveoli Air sacs 500 million alveoli
Contain rich network of blood capillaries
Inner surface of alveoli are covered with surfactant
Lipid or fatty substance
Helps prevent alveoli from collapsing

18. Lungs Organs that contain divisions of the bronchi and alveoli
Right lung has three sections or lobes
Left lung has only two lobes
Pleura is membrane or sac enclosing each lung

20. Health Lung Tissue

21. Organs of the respiratory system

22. Pathway of air from the nose to the capillaries of the lungs.

24. A) Tracheostomy. B) Healed tracheostomy incision

25. Endotracheal intubation.

26. Pneumothorax- Accumulation of air or gas in the pleural cavity, occurring as a result of disease or injury or as a treatment of TB and other lung diseases.

27. Bronchogenic carcinoma.