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Connective tissue fibers are produced by:
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Macrophages
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Mast cells
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Fibroblasts
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All of the above
That's Correct!
It's Wrong!
Fibroblasts are responsible for producing connective tissue fibers. Macrophages and mast cells are types of immune cells that play a role in the immune response and inflammation, but they do not directly produce connective tissue fibers. Therefore, the correct answer is fibroblasts.