Transmission electron micrograph of a thin section of a capillary from the ventricular myocardium of the rat showing part of a reticulocyte (immature erythrocyte) in the lumen of the capillary. The reticulocyte cytoplasm is devoid of membranous organelles but contains free polyribosomes (also known as polysomes) which primarily synthesize globin during the late stages of erythrocyte maturation.
Original 3.25 in. x 4 in. lantern slides were scanned at 600dpi.
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