What are the basic components of blood?

The basic components of blood include red blood cells, white blood cells, platelets, and plasma. Each of these components plays a crucial role in maintaining the overall health and functionality of the body.

Red blood cells, or erythrocytes, are primarily responsible for transporting oxygen from the lungs to the tissues and returning carbon dioxide from the tissues to the lungs. White blood cells, or leukocytes, are part of the immune system, defending the body against infections and foreign invaders. Platelets, or thrombocytes, are essential for blood clotting, which prevents excessive bleeding when injuries occur. Plasma, the liquid portion of blood, carries the blood cells, hormones, nutrients, and waste products, facilitating their movement throughout the body.

The other options do not encompass the full range of components found in blood. The choice that includes only red blood cells and plasma overlooks the vital roles played by white blood cells and platelets. Similarly, the option that mentions just red blood cells and white blood cells excludes plasma, which is critical for the transportation of substances in the blood. The choice highlighting plasma and serum neglects to address the cellular components altogether, which are integral to blood's functions. Recognizing all four components is essential for a comprehensive understanding of