Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Caption: Red blood cells in the Rouleau formation, animated coloured scanning electron micrograph (SEM). Red blood cells are often stacked together because of their shape and the way they pass through tiny capillaries. They are the most abundant type of cell in human blood, accounting for 40% of the blood volume. Each cubic millimetre of blood contains around five million of these tiny, flexible disc-shaped cells. The red colour comes from the iron-containing protein haemoglobin, which picks up oxygen in the lungs and distributes it around the body. Because the cells have no nucleus and are subjected to constant physical action, they last only four months before being destroyed and broken down.

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Keywords: blood, capillaries, capillary, circulatory system, colored, coloured, erythrocyte, erythrocytes, false-colored, false-coloured, haemoglobin, human blood, medical, rbc, rbcs, red blood cell, red blood cells, rouleau, rouleau blood, rouleau formation, rouleau formations, rouleaux, rouleaux blood, rouleaux formations, scanning electron micrograph, sem, stacked blood cells, stacked erythrocytes, stacked red blood cells

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Stacked RBCs, SEM

K006/9634 Rights Managed

Downloadable master

Duration: 00:00:12

Frame size: 1920x1080

Frame rate: 25

Audio: No

Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 232.9M

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Capture format: QuickTime Animation

Codec: Photo - JPEG

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