👉 The r-fluid, also known as red blood cells or erythrocytes, are specialized cells in the human body that play a crucial role in oxygen transport and carbon dioxide removal. These biconcave, disc-shaped cells lack a nucleus and most organelles, which allows them to deform easily and flow freely through the narrowest capillaries. Composed primarily of hemoglobin, a protein that binds oxygen, r-fluid carries oxygen from the lungs to tissues throughout the body and returns carbon dioxide from tissues back to the lungs for exhalation. Their unique structure and function are vital for maintaining cellular respiration and overall physiological homeostasis.
