Blood is approximately what percentage of water?

Blood is composed of approximately 90% water. This high water content is essential for several functions that blood performs in the body. Water serves as a solvent for transporting nutrients, hormones, and waste products. Additionally, it helps regulate body temperature and maintain blood volume, which is crucial for effective circulation. The remaining components of blood consist of cells (such as red blood cells, white blood cells, and platelets) and proteins, which are essential for functions like immune response and clotting. Understanding the composition of blood is crucial in various fields, including esthetics, as it highlights the importance of hydration for overall skin health and body function.