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The photomicrographs of paraffin sections of breast and leg muscles of quails on embryonic day 10 (E10), 11 (E11), 12 (E12), 13 (E13), 14 (E14), 15 (E15), 16 (E16), and 17 (E17). The slices were all made under the same conditions (H&E, 400×).
