1. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 32 Gas Exchange and Transport in Animals

2. Animals Have Gas-Exchange Surfaces 32-

4. Figure 32.1 Blood delivers oxygen to cells and transports carbon dioxide to the external respiration surfaces 32-

6. Figure 32.2A External respiration in a hydra 32-

7. Figure 32.2B An earthworm’s entire external surface functions in external respiration 32-

8. Figure 32.2C Fish have gills to assist external respiration 32-

9. Figure 32.2D Insects have a tracheal system that delivers oxygen directly to their cells 32-

10. Figure 32.2E Vertebrates have lungs with a large total external respiration surface 32-

12. Figure 32.3 Gills in bony fishes help carry out countercurrent exchange 32-

14. Figure 32.4 Tracheae in an insect 32-

16. Figure 32.5 The human respiratory tract 32-

19. Ventilation Precedes Transport 32-

22. Figure 32.7A Inspiration 32-

23. Figure 32.7B Expiration 32-

24. Figure 32.7C Bellows at work 32-

25. Figure 32.7D Respiratory system in birds 32-

27. Figure 32.8 Nervous control of breathing 32-

29. Figure 32.9 External and internal respiration 32-

32. Figure 32.10 The iron atom of a heme group combines loosely with oxygen 32-

34. Figure 32.11A People are now ill from breathing dust at Ground Zero 32-

35. Figure 32.11B A normal lung (with the heart in place) compared to the lungs of a heavy smoker 32-