What is the main function of red blood cells?

The main function of red blood cells is to carry oxygen. They are specialized cells found in the blood that are uniquely designed to transport oxygen from the lungs to the body's tissues. This process involves hemoglobin, a protein within red blood cells that binds to oxygen molecules. When blood circulates through the lungs, red blood cells pick up oxygen and release carbon dioxide, a waste product of metabolism, which is then expelled when we exhale.

The efficiency of red blood cells in transporting oxygen is crucial for maintaining the energy levels of cells throughout the body, supporting functions such as muscle movement and organ operation. This role is integral to overall health and vitality, making red blood cells essential for survival.