File:EB1911 Tunicata - Stages in the Embryology of a Simple Ascidian.jpg
Size of this preview: 529 × 600 pixels. Other resolutions: 212 × 240 pixels | 423 × 480 pixels | 805 × 913 pixels.
Original file (805 × 913 pixels, file size: 216 KB, MIME type: image/jpeg)
 | This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
| Description |
English: Stages in the Embryology of a Simple Ascidian. See legend below. |
|||
| Date | published 1911 | |||
| Source | “Tunicata,” Encyclopædia Britannica (11th ed.), v. 27, 1911, p. 384, fig. 13. | |||
| Author | After Kowalevsky. | |||
| Permission (Reusing this file) |
|
English: Legend:
A to F, Longitudinal vertical sections of embryos, all placed with the dorsal surface uppermost and the anterior end at the right.
A, Early blastula stage, during segmentation.
B, Early gastrula stage.
C, Stage after gastrula, showing commencement of notochord.
D, Later stage, showing formation of notochord and of neural canal.
E, Embryo showing body and tail and completely formed neural canal.
F, Larva just hatched; end of tail cut off.
G, Transverse section of tail of larva.
| adp, | Adhering papillae of larva. |
| at, | Epiblastic (atrial) involution. |
| au, | Auditory organ of larva. |
| ar, | Archenteron. |
| bc, | Blastocoele. |
| bp, | Blastopore. |
| ch, | Notochord. |
| ep, | Epiblast. |
| hy, | Hypoblast. |
| nc, | Neural canal. |
| nec, | Neurenteric canal. |
| oc, | Ocular organ of larva. |
| g, | Gelatinous investment of embryo. |
| m, | Muscle cells of tail. |
| mes, | Mesenteron. |
| mc, | Mesoderm cells. |
| nv, | Cerebral vesicle at anterior end of neural canal. |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:42, 17 July 2019 | | 805 × 913 (216 KB) | Bob Burkhardt | {{Information |description ={{en|1=Stages in the Embryology of a Simple Ascidian. See legend below.}} |date =published 1911 |source =“Tunicata,” ''Encyclopædia Britannica'' (11th ed.), v. 27, 1911, p. 384, fig. 13. |author =After Kowalevsky. |permission ={{PD-Britannica}} }} {{en|Legend:}} A to F, Longitudinal vertical sections of embryos, all placed with the dorsal surface uppermost and the anterior end at the right. A, Early blastula stage, during segmentation.... |
File usage
The following 2 pages use this file:
