Here's why:
* Lack of mitochondria: Red blood cells lack mitochondria, the powerhouses of cells that typically generate energy through aerobic respiration.
* Anaerobic glycolysis: Red blood cells rely on anaerobic glycolysis, a process that breaks down glucose without oxygen, to produce ATP (adenosine triphosphate), the cell's main energy currency.
* Oxygen transport: Their primary function is to transport oxygen throughout the body, and they need energy to maintain their shape and flexibility to navigate blood vessels.
Therefore, glucose is essential for red blood cells to function properly and carry out their vital role in oxygen transport.
