In Canadian football, while only 12* players are playing on the field at once, teams need more than just 12* players. They must have an offensive and defensive team. Most highâ¦ school football teams have 1st, 2nd, and 3rd string players, so thirty to forty players is a reasonable number.
Gastroenteritis may result from ingesting chemical toxins (see Chemical Food Poisoning). These toxins are usually produced by a plant, such as poisonous mushrooms, or by certain kinds of exotic seafood and thus are not the product of an infection.
Chemical poisoning -- Helium: Helium is a chemical used mainly in helium balloons, neon signs and diving gas.The gas is sometimes misused as an inhalant. Ingestion and other exposures to the chemical can cause various symptoms.hemical poisoning -- Helium: Helium is a chemical used mainly in helium balloons, neon signs and diving gas.