File:O'Rahilly1956 plate01.jpg
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Plate 1. Upper Limb
Magnifications given in Plates 1 and 2 are the original ones used in taking the photomicrographs.
FIG. A. Horizon 12. Embryo No. 5923. 4 mm. 2-3-2. x 200. The upper limb bud projects at the left-hand side of the photomicrograph. The ectodermal thickening can be seen on the ventral surface and lateral margin of the limb bud. The extent of the thickening in this embryo can be assessed from Text-fig. 1.
FIG. B. Horizon 13. Embryo No. 8066. 53 mm. 6-4-4. x 100. The upper limb bud projects at the right-hand side of the photomicrograph. The ectodermal thickening shows several layers of nuclei.
FIG. C. Horizon 14. Embryo No. 8552. 65 mm. 8-3-4. x200. The lateral portion of the ecto- dermal thickening forms a prominent elevation, the ectodermal ridge, which occupies the ventro- lateral or pre-axial border of the limb. The marginal vein can be seen adjacent to the ridge.
FIG. D. Horizon 17. Embryo No. 8998. 11 mm. 21-1-3. x200. The ectodermal ridge forms the margin of the digital plate.
Cite this page: Hill, M.A. (2024, May 25) Embryology O'Rahilly1956 plate01.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:O%27Rahilly1956_plate01.jpg
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
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