What substance does the term 'plasma' refer to in a veterinary blood sample?

The term 'plasma' specifically refers to the liquid component of blood. It is primarily composed of water, electrolytes, proteins, hormones, and waste products. Plasma serves various essential functions, including transporting nutrients, gases, and waste products throughout the body. It plays a crucial role in maintaining blood pressure and volume as well as regulating body temperature.

The solid part of blood consists of red blood cells, white blood cells, and platelets, which are essential for oxygen transport, immune response, and clotting, respectively. The entire blood volume includes both plasma and the solid components. Fatty tissue is not related to blood composition directly; rather, it is part of the body's storage for energy. Understanding that plasma is the fluid quality rather than the cellular or tissue aspects is key to grasping its role in veterinary medicine.