Some substances are more toxic than others. The toxicity of a substance is described by the types of effects it causes and its potency. 1  Types of Effects: Different chemicals cause different effects.
I think I remember reading that injured means bruises and lascerations, seriously injured meant hospital but not life threatening, critically injured meant hospital ICU time and fatally injured meant injuries leading to dying sometime later.
2 adj A critical situation is very serious and dangerous. The German authorities are considering an airlift if the situation becomes critical..., Its day-to-day finances are in a critical state. â¦ critically adv usu ADV adj. Moscow is running critically low on food supplies.