44.Supermarket
45.originally
46.called
47.favorite
48. oval-shaped
49.fuzzy
50.means
51.unique
52.nutrients
53.protective
54.problems
55.coughs
56.source
57.pumping
58.through
59.contains
60.oxygen
61.recycles
62.cleans
63.sends
64.journey
65.liters
66.every day
67.travels
68.follow
69.smoke
70.disease