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Which one of the following is not a benefit of saliva ?
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- It facilitates swallowing
- It increases RBCs in the body
- It keeps the mouth and teeth clean
- It aids speech by facilitating movements of lips and tongue
Correct Option: B
Saliva does not increase the number of red blood cells in the body which is a condition of disease called Polycythemia. It results in an increased level of circulating red blood cells in the bloodstream.
