This video looks at factors that influence shock and decreased tissue perfusion. [7:39]

This video explains why cells need oxygen and what happens when cells do not receive oxygen resulting in shock. This video also describes the different types of shock. [9:07]

An overview of shock or tissue perfusion and how it relates to the cardiovascular system. Hypovolemic shock, cardiogenic shock, obstructive shock, and distributive shock are explained.

An explanation, symptons, diagnosis, and treatment of hypovolemic shock as related to the circulatory system is offered in this tutorial.

This video explains the basics of shock and the four different types. [7:14]