32.1 MB (1.4 MB compressed)
3800 x 2948 pixels
32.3 x 24.9 cm ⏐ 12.7 x 9.8 in (300dpi)
STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Bird red blood cells. Coloured scanning electron micrograph (SEM) of red blood cells (erythrocytes, orange) in avian heart tissue (purple). These cells contain haemoglobin, a pigment that allows these cells to carry oxygen around the body. Non- mammalian red blood cells (such as avian ones) are oval in shape and contain a cell nucleus (not seen). Human red blood cells are disc-shaped and do not have a cell nucleus.
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