Why is it necessary to maintain a constant flow of blood?

The circulatory system is the main transport system in the body.
It is the blood that ensures the delivery of vital substances to the tissues, for example, the blood carries oxygen.
Without blood circulation, the tissues will not receive the necessary substances and begin to die off.
In addition, it is in the blood that the main protective cells of the body are located and move: leukocytes and phagocytes.
If these cells do not arrive at the affected area of the body, the body will not be able to fight off viruses and bacteria. There is simply no one to stop infection and infection.