Final answer:
The stomach absorbs most of the alcohol into the bloodstream when a person drinks alcohol.
Step-by-step explanation:
The organ that absorbs most of the alcohol into the bloodstream when a person drinks is the stomach.
Alcohol is a substance that can be absorbed directly through the lining of the stomach walls and enters the bloodstream quickly. From the bloodstream, it is then distributed throughout the body.
The liver also plays a role in metabolizing alcohol and breaking it down, but the stomach is the primary organ responsible for absorbing alcohol into the bloodstream. The liver metabolizes up to 85% - 98% of the circulatory ethanol through various metabolic processes and is crucial in the detoxification of blood, although it is not where most alcohol absorption occurs.