Red blood cells in a capillary, TEM

Red blood cells in a capillary, TEM

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Credit: DENNIS KUNKEL MICROSCOPY/SCIENCE PHOTO LIBRARY

Caption: Red blood cells in a capillary (human central nervous system), coloured transmission electron micrograph (TEM). Red blood cells (RBCs), or erythrocytes, are the most common type of blood cell in vertebrates. They are involved in delivering oxygen to the body tissue. RBCs take up oxygen in the lungs or gills and release it into tissues while squeezing through the body's capillaries. The cytoplasm of RBCs is rich in haemoglobin, an iron-containing biomolecule that can bind oxygen and is responsible for the red color of the cells. The cell membrane is composed of proteins and lipids and this structure provides properties essential for physiological cell function (deformability and stability) while traversing the circulatory system, especially the capillary network. In humans, mature RBCs are flexible and oval biconcave disks. Capillaries are the small blood vessels that make up the microcirculation of the human body. Magnification: x1,355 when shortest

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Keywords: 71271a, blood, brain, brain capillary, capillaries, capillary, capillary blood, central nervous system, circulatory system, cns, colored, coloured, endothelia, endothelial cell, endothelial cells, endothelium, epithelia, epithelial, epithelium, erythrocyte, erythrocytes, false-colored, false-coloured, haemoglobin, human blood, human body, medical, nucleus, red blood cell, red blood cells, tem, transmission electron micrograph

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