Which of the following is NOT a component of blood?

Neurons are indeed not a component of blood. Blood is composed of several key components, including plasma, erythrocytes (red blood cells), and platelets. Plasma serves as the liquid medium that carries cells, nutrients, hormones, and waste products throughout the body. Erythrocytes are responsible for transporting oxygen from the lungs to body tissues and returning carbon dioxide. Platelets play a crucial role in blood clotting and wound healing.

In contrast, neurons are specialized cells that make up the nervous system, responsible for transmitting signals throughout the body. They are not found in the bloodstream and serve a completely different function compared to the components of blood.