Why plasma a nonliving component of blood?

Plasma, the liquid component that makes up about 55% of blood volume, is indeed classified as a nonliving component of the blood. While the other cellular components of blood, including red blood cells (erythrocytes), white blood cells (leukocytes), and platelets (thrombocytes), are alive, plasma can be considered a nonliving extracellular matrix. Here are a few reasons why:

Lack of Cellular Metabolism: Plasma, unlike living cells, does not carry out cellular metabolism. It does not have a nucleus, mitochondria, or other organelles required for energy production, protein synthesis, and cellular functions.

Inert Composition: Plasma consists of various dissolved ions, proteins, hormones, and waste products but lacks the self-organizing and self-repairing properties associated with living organisms.

Lack of Cellular Structure: Unlike living cells, plasma is not organized into a structured entity. It is essentially an aqueous solution of molecules within the bloodstream.

Absence of Growth and Reproduction: Plasma does not have the ability to grow, divide, or reproduce on its own. The composition of plasma is maintained through various processes within the body, including exchange of substances with other compartments and regulation by organs such as the liver and kidneys.

Non-Replicative Nature: Plasma is not self-replicative, meaning it is incapable of producing new plasma or other blood cells.

Although plasma is essential for maintaining blood volume, transporting substances, and facilitating numerous physiological processes, it lacks the defining characteristics of living organisms. Hence, it is considered a nonliving component of blood.