What is the primary component of blood responsible for oxygen transport?

The primary component of blood responsible for oxygen transport is red blood cells. These cells contain hemoglobin, a protein that binds to oxygen in the lungs and carries it to tissues throughout the body. The structure of red blood cells, which are biconcave discs, provides a large surface area for gas exchange, enhancing their efficiency in transporting oxygen.

In contrast, white blood cells play a crucial role in immune defense, platelets are involved in clotting processes, and plasma serves as the liquid component of blood that carries cells, nutrients, hormones, and waste products. While all these components are essential for various functions in the circulatory system, it is the red blood cells that are specifically tasked with the vital role of oxygen transport.