Alcohol can be absorbed directly from the stomach without going through the digestive system. After entering the gastrointestinal tract, the wine enters the bloodstream. After drinking for a few minutes, it quickly spreads into the body. The wine is first brought to the liver by the bloodstream, filtered by the liver, reaches the heart, then reaches the lungs, returns from the lungs to the heart, and then passes through the aorta to the veins before reaching the brain and advanced nerve centers. Alcohol has the biggest influence on the brain and nerve center.
The human body can also synthesize a small amount of alcohol, and normal people's blood contains 0.003% alcohol. The lethal dose of alcohol in blood is 0.7%.