Red blood cells, light micrograph

Red blood cells, light micrograph

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Credit: MICROSCAPE/SCIENCE PHOTO LIBRARY

Caption: Red blood cells (erythrocytes) found within a venule. In this tissue section the erythrocytes (about 7µm in size) show their biconcave shape which is deformable allowing them to pack closely together. This ‘shape-shifting’ 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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Keywords: biological, biology, blood, blood vessel, eosin stain, erythrocyte, haematoxylin, haemoglobin, histological, histology, light micrograph, light microscopy, no-one, nobody, red blood cell, red blood corpuscle, section, vascular system, vein, venule

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