Blood is primarily composed of water, making up about 51% of its total volume. This percentage can be calculated by considering the proportion of plasma and blood cells in the blood, and the water content of plasma itself.
Typically, blood consists of 55% plasma and 45% blood cells and other components. Plasma is itself about 92% water, which contributes significantly to the overall water content of blood.
While the exact percentage of water in blood can fluctuate slightly based on factors like age and sex, it remains a critical component for various physiological processes. Blood's water content facilitates the transportation of nutrients, oxygen, and waste products throughout the body, plays a crucial role in maintaining body temperature, and contributes to the overall fluid balance.
