Answers for Lymphatic/Immune/Respiratory systems test from the library:

1. d                                               28.    c
2. b                                               29.    a
3. b                                               30.    a
4. d                                               31.    c
5. c                                               32.    b
6. c                                               33.    a
7. a                                               34.    a
8. a                                               35.    c
9. b                                               36.    a
10. b                                               37.    d
11. c                                               38.    d, e
12. b                                               39.    T
13. a                                               40.    T
14. c                                               41.    T
15. e                                               42.    T
16. b                                               43.    F
17. d                                               44.    T
18. c                                               45.    T
19. b                                               46.    F
20. d
21. a                                               47.    diffuse lymphatic tissue
22. c                                               48.    carbonic anydrase
23. b                                               49.    surface tension
24. c                                               50.    negative
25. d
26. e
27. e