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.
The most common mechanical causes of gas and bloating include: 1  Smoking. 2  Chewing gum. 3  Eating too fast. 4  Poor-fitting dentures. 5  Drinking through a straw. 6  Swallowing air.