Respiratory System

1. Respiratory System

2. Objective 1 • See diagram

6. Pathway: • Nostril—sinuses—pharynx—larynx—trachea—bronchi—bronchioles—bronchiole tube--alveoli

8. alveoli

11. Objective 2: Protection • Mucus collects dust and debris • Cilia propel mucus • Hairs filter air

14. Objective 3 Membrane Structure Single cell layer thick Covered with capillaries Allows rapid exchange of gases

19. Objective 4: Lungs/Pleura • Left Lung—two lobes • Right lung—three lobes • Pleura—thin lining on outside between lung and thoracic wall

22. Lab • Locate the respiratory structures on the cat pluck. • Insert the pins in the structures.

23. Day 2 Agenda: Look over 6 weeks grades Conduct lung volume lab

24. Respiration Unit Day 3 "Virtue herself is her own fairest reward."-Silius Italicus, Punica

25. Today’s Agenda • Look over air flow sequence • Notes on objective 5-9 • Lung volume Lab

26. Boyles Law and Breathing • Boyles Law: Pressure of a gas varies inversely with its volume. Inspiration lowers pressure in thorax, air flows inward. Expiration raises pressure, air moves out.

30. Objective 6: Muscles of Inspiration • Inspiration occurs when the diaphragm and the intercostal muscles contract. • Expiration occurs more passively as these muscles relax and the lungs recoil.

31. Obj. 7 Partial Vacuum The intrapleural space (space between lung and wall of chest) always has a more negative pressure than the interpulmonary space (inside lungs).

32. Obj. 7 Partial Vacuum The negative pressure must exist at all times to keep the lung in its proper shape and location to prevent lung collapse.

33. Obj. 8 Pulmonary Ventilation • Friction in airways causes resistance and results in more strenuous breathing. • Lung compliance depends on the elasticity of the lungs and chest flexibility.

34. Obj. 8 Pulmonary Ventilation • Surface tension of alveolar fluid reduces alveoli size and could collapse alveoli.

35. Obj. 9 Lung Volumes • Tidal volume – normal inhale/exhale amount • Residual volume – air that remains in lungs after exhale.

36. Obj. 9 Lung Volumes • Inspiratory volume – amount that can be forcefully inhaled • Expiratory reserve – amount of forced exhale

38. Lung Volume Lab:

39. Respiration Unit: Day 4

40. Today’s Agenda • Revisit Lung Volumes and gross anatomy. • Quiz • Complete Volumes worksheet using summary chart in notes • Notes on objectives 10-13

41. Today’s Agenda • Notes on objectives 10-13 • Respiration video • Practice questions

42. Obj. 10 Composition of Atmospheric and Alveolar Air

43. Obj. 10 • Oxygen goes into blood @ alveoli • Oxygen moves from blood into cells at the capillary bed. • Oxygen is transported by hemoglobin. • Carbon dioxide is most likely transported at bicarbonate ion.

46. Obj. 11 • Oxygen is transported in the blood attached to hemoglobin HHb + O2 --> HbO2

47. Objective 12 • Carbon dioxide is carried in the body primarily as bicarbonate ion. CO2 +H2O -->H2CO3-->H + CO3-

48. Respiration Unit: Day 6 "The scientific theory I like best is that the rings of Saturn are composed entirely of lost airline luggage."-Mark Russell

49. Today’s Agenda • Complete Objective Notes • Practice matching symptom & disorder • Homeostatic Imbalances sheet

50. Obj. 11 • Oxygen is transported in the blood attached to hemoglobin HHb + O2 --> HbO2