Why is the vascular system important?

Vascular system. Supplies blood to body and no organ can survive without blood flow .
It's the plumbing. It is the plumbing necessary to delivery oxygen to all the tissues of the human body. It is also important for regulating blood flow and pressure. Without functioning blood vessels, tissues die.
Oxygen delivery. The vascular system includes the circulation of blood, plasma, oxygen and nutrients to and from all parts of the body. It has multiple parts- but the arteries and veins and lymph channels are very influential in survival.