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RESPIRATION Exchange of gases (O 2 and CO 2 ) Diffusion through a thin moist membrane Nose: 2 nostrils Air warmed and filtered Cilia and mucus.

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Presentation on theme: "RESPIRATION Exchange of gases (O 2 and CO 2 ) Diffusion through a thin moist membrane Nose: 2 nostrils Air warmed and filtered Cilia and mucus."— Presentation transcript:

1 RESPIRATION Exchange of gases (O 2 and CO 2 ) Diffusion through a thin moist membrane Nose: 2 nostrils Air warmed and filtered Cilia and mucus

2 Pharynx: Throat Trachea: Rings of cartilage; windpipe Epiglottis: flap over opening Larynx: voice box holding vocal cords Adams Apple: large piece of cartilage; result of testosterone Bronchi: Right Bronchus: shorter, wider, straighter than the left Lungs: Covered by pleura (slimy covering)

3 Bronchioles: Little branches of bronchi Alveoli: Air sacs surrounded by capillaries; increased surface area; Look like bunches of grapes; thin walls (diffusion) 1 million in each lung

4 Mechanics of Respiration: Diaphragm: thin, flat muscle between the thorax and the abdomen; connected to the medulla (brain) by the phrenic nerve Inhalation: Diaphragm contracts and flattens; Ribs out/up; Chest cavity enlarges (Vol. Up/Pressure down); O 2 moves into lungs Exhalation: Diaphragm relaxes into upside down U; Intercostal muscles pull ribs together; Chest cavity smaller (Vol. Down/ Pressure up); CO 2 moves out

5 Chemistry of Respiration: Transportation of O 2 : Hemoglobin + O 2 as …. Oxyhemoglobin Transportation of CO 2 : CO 2 + H 2 O as …. Bicarbonate ions (HCO 3 -) External Respiration: between the alveoli and the blood Internal Respiration: between blood and cells

6 Respiratory Problems: Laryngitis: inflammation of the larynx Bronchitis: inflammation of the bronchi Pneumonia: fluid in the alveoli Emphysema: collapse of the alveoli Asthma: constriction of the bronchioles Hiccups: spasms of the diaphragm Sneeze: irritation in the nasal passages Cough: irritation in the lower respiratory tract Lung Cancer: tumors/related to smoking


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