9. Trachea – surrounded by cartilage rings that keep the tube open Left lung Left bronchus, the major division of the trachea as it enters the lungs
10.
11. Trachea – surrounded by cartilage rings that keep the tube open Left lung Left bronchus, the major division of the trachea as it enters the lungs Bronchiole – a smaller branch off the larger bronchus
12.
13. Trachea – surrounded by cartilage rings that keep the tube open Left lung Left bronchus, the major division of the trachea as it enters the lungs Bronchiole – a smaller branch off the larger bronchus Heart – responsible for pumping blood around the body
14.
15. Trachea – surrounded by cartilage rings that keep the tube open Left lung Left bronchus, the major division of the trachea as it enters the lungs Bronchiole – a smaller branch off the larger bronchus Heart – responsible for pumping blood around the body Rib – provides protection for lungs and heart
16.
17. Trachea – surrounded by cartilage rings that keep the tube open Left lung Left bronchus, the major division of the trachea as it enters the lungs Bronchiole – a smaller branch off the larger bronchus Heart – responsible for pumping blood around the body Rib – provides protection for lungs and heart Right lung
18. Trachea – surrounded by cartilage rings that keep the tube open Left lung Left bronchus, the major division of the trachea as it enters the lungs Bronchiole – a smaller branch off the larger bronchus Heart – responsible for pumping blood around the body Rib – provides protection for lungs and heart Right lung Right bronchus
19. Trachea – surrounded by cartilage rings that keep the tube open Left lung Left bronchus, the major division of the trachea as it enters the lungs Bronchiole – a smaller branch off the larger bronchus Heart – responsible for pumping blood around the body Rib – provides protection for lungs and heart Right lung Right bronchus Alveoli (air sacs), site of gas exchange
20.
21. Trachea – surrounded by cartilage rings that keep the tube open Left lung Left bronchus, the major division of the trachea as it enters the lungs Bronchiole – a smaller branch off the larger bronchus Heart – responsible for pumping blood around the body Rib – provides protection for lungs and heart Right lung Right bronchus Alveoli (air sacs), site of gas exchange Intercostal muscles lift ribs up & out
24. Gas Exchange in the alveoli Oxygen from the air in the alveoli diffuses into the blood. At the same time, carbon dioxide from the blood diffuses into the alveoli.
25. Gas Exchange in the alveoli Oxygen from the air in the alveoli diffuses into the blood. At the same time, carbon dioxide from the blood diffuses into the alveoli. Oxygen dissolves in the moist lining
26. Gas Exchange in the alveoli Oxygen from the air in the alveoli diffuses into the blood. At the same time, carbon dioxide from the blood diffuses into the alveoli. Oxygen dissolves in the moist lining Oxygen diffuses into the blood
27. Gas Exchange in the alveoli Oxygen from the air in the alveoli diffuses into the blood. At the same time, carbon dioxide from the blood diffuses into the alveoli. Oxygen dissolves in the moist lining Oxygen diffuses into the blood the blood carries oxygen to the cells
28. Gas Exchange in the alveoli Oxygen from the air in the alveoli diffuses into the blood. At the same time, carbon dioxide from the blood diffuses into the alveoli. Oxygen dissolves in the moist lining Oxygen diffuses into the blood the blood carries oxygen to the cells cells of the body use oxygen for respiration
29. Gas Exchange in the alveoli Oxygen from the air in the alveoli diffuses into the blood. At the same time, carbon dioxide from the blood diffuses into the alveoli. Oxygen dissolves in the moist lining Oxygen diffuses into the blood the blood carries oxygen to the cells cells of the body use oxygen for respiration carbon dioxide goes into the blood
30. Gas Exchange in the alveoli Oxygen from the air in the alveoli diffuses into the blood. At the same time, carbon dioxide from the blood diffuses into the alveoli. Oxygen dissolves in the moist lining Oxygen diffuses into the blood the blood carries oxygen to the cells cells of the body use oxygen for respiration carbon dioxide goes into the blood the blood carries carbon dioxide to the lungs
31. Gas Exchange in the alveoli Oxygen from the air in the alveoli diffuses into the blood. At the same time, carbon dioxide from the blood diffuses into the alveoli. Oxygen dissolves in the moist lining Oxygen diffuses into the blood the blood carries oxygen to the cells cells of the body use oxygen for respiration carbon dioxide goes into the blood the blood carries carbon dioxide to the lungs carbon dioxide diffuses into the alveoli
35. Breathing Breathing in (inspiration) intercostal muscles contract rib cage moves up and out
36. Breathing Breathing in (inspiration) intercostal muscles contract rib cage moves up and out diaphragm becomes flatter when the muscle contracts
37. Breathing Breathing in (inspiration) intercostal muscles contract rib cage moves up and out diaphragm becomes flatter when the muscle contracts air rushes in
38. Breathing Breathing in (inspiration) intercostal muscles contract rib cage moves up and out diaphragm becomes flatter when the muscle contracts Breathing out (expiration) intercostal muscles relax
39. Breathing Breathing in (inspiration) intercostal muscles contract rib cage moves up and out diaphragm becomes flatter when the muscle contracts Breathing out (expiration) intercostal muscles relax rib cage moves down and in
40. Breathing Breathing in (inspiration) intercostal muscles contract rib cage moves up and out diaphragm becomes flatter when the muscle contracts Breathing out (expiration) intercostal muscles relax rib cage moves down and in diaphragm becomes dome-shaped when the muscle relaxes
41. Breathing Breathing in (inspiration) intercostal muscles contract rib cage moves up and out diaphragm becomes flatter when the muscle contracts intercostal muscles relax rib cage moves down and in diaphragm becomes dome-shaped when the muscle relaxes air is pushed out