No, blood is not a pure substance; it is a complex mixture.
Blood consists of various components, including red blood cells, white blood cells, platelets, and plasma. Each of these components has different functions and characteristics. Red blood cells are primarily responsible for transporting oxygen, while white blood cells are crucial for the immune response. Platelets play a key role in blood clotting, and plasma, which makes up about 55% of blood’s volume, contains water, electrolytes, hormones, nutrients, and waste products.
Because blood contains these diverse elements, it cannot be classified as a pure substance, which is defined as a material made up of only one type of particle. Instead, blood exemplifies a heterogeneous mixture, where the different components remain distinct and can be separated by physical means. This mixture is vital for various bodily functions, including circulation, immunity, and homeostasis.