Why do you vomit blood after drinking poison? Talking about the poisoning principle of poison.

Basically, it enters the blood circulation through the gastrointestinal tract, which eventually causes nervous disorder or paralysis of the central nervous system and brain stem. Cardiopulmonary failure, suffocation and death. There are also cases of vomiting blood, causing gastrointestinal mucosal damage and internal bleeding to death. This kind of poison is not much, and it dies slowly. Of course, there are also specific drugs that damage other internal organs, and the cost is relatively high. This is the case with cyanide and sodium poison.