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.
Background: There are only a few studies about the causes of mortality among critically. ill patients in Intensive Care Unit (ICU). Objective: To determine the main causes of death among critically ill patients in ICU. Design: A Retrospective Study. Setting: Ibn Sina Teaching Hospital, Hadhramout Province, Yemen.