File:Aves Surface views of two stages of the blastoderm of the egg of the sparrow.jpg

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Fig. 35. — Surface views of two stages of the blastoderm of the egg of the sparrow. (After Schaiiinsland.)
A. Before the appearance of the primitive streak.
B. The first appearance of the primitive streak.

a. o., Area opaca. a. p., Area pellucida. Ent. Th., Thickening of entoderm, pr. str., Primitive streak.
Date
Source https://archive.org/details/developmentofchi00lill/page/71/mode/1up?view=theater The development of the chick; an introduction to embryology. NEW YORK HENRY HOLT AND COMPANY 1908
Author Lillie, Frank Rattray

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[[Category:Blastoderm] [[Category:Endoderm]

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current00:19, 12 April 2024Thumbnail for version as of 00:19, 12 April 20241,456 × 789 (883 KB)Rasbak (talk | contribs){{information |description=Fig. 35. — Surface views of two stages of the blastoderm of the egg of the sparrow. (After Schaiiinsland.)<br> A. Before the appearance of the primitive streak.<br> B. The first appearance of the primitive streak.<br> a. o., Area opaca. a. p., Area pellucida. Ent. Th., Thickening of entoderm, pr. str., Primitive streak. |date=1908 |source=https://archive.org/details/developmentofchi00lill/page/71/mode/1up?view=theater The development of the chick; an introduction to...

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