MICROSCAPE / SCIENCE PHOTO LIBRARY MICROSCAPE / SCIENCE PHOTO LIBRARY
Red blood cells (erythrocytes) found within a venule. In this tissue section the erythrocytes (about 7Âµm in size) show their biconcave shape which is deformable allowing them to pack closely together. This âshape-shiftingâ function also permits them to squeeze along narrow passageways such as the smallest capillaries. Red blood cells are not true cells as they have lost their nuclei. Blood is red due to erythrocyte haemoglobin binding to oxygen (oxyhemoglobin). Magnification x650 when printed at 10 cm.
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