Until recently, medicine and dentistry were thought to be unrelated. Scientists now understand that hundreds of bacteria species live in the human mouth and can enter the bloodstream and travel through
the body. This table describes four bacteria found in the mouth that scientists have linked to conditions
previously thought to be unrelated to oral health.
Bacteria Found in Human Mouth

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a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.