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Respiratory System. Lungs & Air passages Responsible for taking in oxygen and removing carbon dioxide (CO 2 ) 4 – 6 minute supply of oxygen Includes:

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Presentation on theme: "Respiratory System. Lungs & Air passages Responsible for taking in oxygen and removing carbon dioxide (CO 2 ) 4 – 6 minute supply of oxygen Includes:"— Presentation transcript:

1 Respiratory System

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

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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

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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

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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

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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

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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

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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

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20 Health Lung Tissue

21 Organs of the respiratory system

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

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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.

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