Why do you die if you don't have any blood in your body?

Blood is essential for life because it carries oxygen and nutrients to cells, removes waste products, and plays a critical role in immune response and temperature regulation. Without blood, tissues and organs cannot receive the oxygen they need to function, leading to cell death and ultimately organ failure. Additionally, blood helps maintain blood pressure and circulatory stability, so its absence would disrupt vital bodily functions. Therefore, lacking blood would quickly result in death.