is when adequate blood and oxygen are provided to all cells in diff. tissues and organs in the body.
occurs when the body tissues do not receive enough oxygen rich blood. (Note: do not confuse this w/ electric shock or being shocked, as in being scared or surprised) Shock (hypoperfusion) describes a state of collapse and failure of the cardiovascular system which blood circulation decreases and eventually ceases. Shock can be associated with wide conditions- from heart attack to severe allergic reation