Embryo Chick

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Embryo chick (36 hours), viewed from beneath as a transparent object (magnified). Labels:pl, outline of pellucid area; FB, forebrain, or first cerebral vesicle: from its sides project op, the optic vesicles; SO, backward limit of somatopleure fold, “tucked in", under head; A, head-fold of true amnion; a’, reflected layer of amnion, sometimes termed “false amnion;” sp, backward limit of splanchnopleure folds, along which run the omphalomesaraic veins uniting to form h, the heart, which is continued forwards into ba, the bulbus arteriosus; d, the foregut, lying behind the heart, and having a wide crescentic opening between the splanchnopleure folds; HB, hindbrain; MB, midbrain; pv, protovertebrae lying behind the foregut; mc, line of junction of medullary folds and of notochord; ch, front end of notochord; vpl, vertebral plated; pr, the primitive groove at its caudal end.


embryo, chick


Bird Anatomy


Baker, W. Morrant & Harris, Vincent Dormer Kirkes' Hand-book of Physiology, 13th ed. (Philadelphia: P. Blakiston's Son & Co., 1892) 797


TIFF (full resolution)

1059×2400, 544.3 KiB

Large GIF

451×1024, 79.4 KiB

Medium GIF

282×640, 37.5 KiB

Small GIF

141×320, 12.7 KiB