What does plasma refer to in human biology?

Plasma refers to the fluid portion of blood in human biology and plays a vital role in various physiological processes. It makes up about 55% of total blood volume and is primarily composed of water, electrolytes, nutrients, hormones, proteins, and waste products. Plasma serves as a medium for transporting blood cells, nutrients, and waste materials throughout the body. It also contains important proteins such as albumin, which helps maintain osmotic pressure, and globulins, some of which are involved in immune responses. This fluid consistency allows for the efficient movement of substances necessary for homeostasis and overall bodily function.