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Which organ of the digestive system does not directly contact food?
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Which describes the effect of prolonged stress on blood pressure? it causes blood pressure to decrease. it has little or no effect on blood pressure. it causes the heart to pump with more force. it causes blood pressure to increase.
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True or false. mucous membranes secrete mucus that traps pathogens.
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Which organ of the digestive system does not directly contact food?...
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