That is the equivalent of an adult human eating 3 lbs. There are about 1200 known species of poisonous or venomous marine animals, countless numbers of venomous spiders, and 375 species of dangerous snakes. Don t eat a poisonous toad, but go ahead and have a venomous snake for diner. Venom needs a delivery system directly into the blood to be toxic. That is 70 mg for an adult weighing 70 kg or 10 mg for a child weighing 10 kg.
Size is once again a critical factor in determining toxicity.
The nature of the adverse effect from a single exposure changes as the dose changes. For some low doses their will be no response. As the dose is increased the victim become uncoordinated, has blurred vision and reduced reaction time. Higher doses produces slurred speech, further loss of coordination, and convulsions. Exposure routes Chemicals can be ingested, injected, inhaled, or exposed by skin contact.