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 Gas exchange: CO 2 out and O 2 in  Control of blood pH  Sound/voice production  Olfaction  Protection for invading organisms.

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Presentation on theme: " Gas exchange: CO 2 out and O 2 in  Control of blood pH  Sound/voice production  Olfaction  Protection for invading organisms."— Presentation transcript:

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2  Gas exchange: CO 2 out and O 2 in  Control of blood pH  Sound/voice production  Olfaction  Protection for invading organisms

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4  The nose consists of the external nose and the internal nasal cavity  The nostrils are called the nares.

5  Mucus traps microbes and debris  Cilia sweep the mucus to the esophagus to be digested  Air is also moistened and warmed

6  Common passageway for the digestive and respiratory systems  Contains the tonsils which help the body fight infection

7  Site of the vocal cords  Laryngitis – inflammation of the vocal cords  The epiglottis ensures food is sent to the correct passageway by opening or closing.

8  Long tube of smooth muscle and connective tissue  Cartilage rings provide protection and prevent collapse

9  Two main branches that lead to each lung  Very sensitive to stimulation so tiny changes may trigger strong cough reflexes

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11 The lungs are found within the pleural cavity that is inside the thoracic cavity.

12 A few mL of pleural fluid is always present in the pleural space. It is needed for the lungs to properly function. Too much fluid build up is called effusion.

13  You have a left and a right lung  The functional units of the lungs where gas exchange happens are the alveoli. CO 2 and O 2 are exchanged by diffusion


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