The fluid squeezed from blood vessels due to the high pressure exerted by the heart is called plasma. Plasma is the liquid component of blood that carries various substances such as nutrients, hormones, electrolytes, and waste products throughout the body. It makes up about 55% of total blood volume and is mostly composed of water along with proteins, electrolytes, and gases.
When blood is centrifuged, it separates into its components, with plasma being the straw-colored fluid at the top layer. Red blood cells, white blood cells, and platelets are found in the bottom layer called the "buffy coat" during this process.
Plasma plays a crucial role in maintaining blood pressure, transporting nutrients and waste, regulating body temperature, and helping in clotting processes. It is distinct from the formed elements in blood like red blood cells, white blood cells, and platelets, which are suspended in plasma.
Therefore, the correct answer to the question is plasma.
