Which of the following is NOT a component of blood?

Neurons are indeed not a component of blood. Blood is composed of several main components, including red blood cells, white blood cells, and platelets. Red blood cells are responsible for transporting oxygen from the lungs to the body's tissues and carrying carbon dioxide back to the lungs for exhalation. White blood cells are crucial for the immune system, helping to defend against infections and foreign bodies. Platelets play a vital role in blood clotting, preventing excessive bleeding when injuries occur.

Neurons, however, are the fundamental units of the nervous system, responsible for transmitting signals throughout the body. They are found in the brain, spinal cord, and peripheral nerves, but do not exist in the blood itself. Understanding these fundamental components of blood is essential for understanding their respective functions and the overall role of blood in the human body.