File:Ascaris distribution of presumptive organ regions (cell lineage) during cleavage.jpg

From Wikimedia Commons, the free media repository
Jump to navigation Jump to search

Original file ‎(1,015 × 1,279 pixels, file size: 1.04 MB, MIME type: image/jpeg)

Captions

Captions

Add a one-line explanation of what this file represents

Summary

[edit]
Description Fig. 164. Distribution of presumptive organ regions (cell lineage) during cleavage in Ascaris. (After Durken: Experimental Analysis of Development. New York, W. W. Norton, based upon figures by Boveri and zur Strassen.) (A) Two-cell stage, showing primordial soma cell and first stem cell. (B) Two ectodermal cells. A and B. Soma cell, S,. is a mixture of mesoderm, stomodacum, and entoderm; second stem cell, P,. is a mixture of mesoderm and germ-cell material. The symbolism used to designate the various organ-forming substances is shown in (G). The progressive segregation into separate cells of the substances shown in cells S., and P, is given in (C-G). Cf. also fig. 6 IE.
Date
Source https://archive.org/details/comparativeembry00nels/page/331/mode/1up?view=theater&q=BLASTULATION+ Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illustrations.
Author Nelsen, Olin E.

Licensing

[edit]
Public domain

This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer.

You must also include a United States public domain tag to indicate why this work is in the public domain in the United States.
 Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Jamaica has 95 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Honduras has a general copyright term of 75 years, but it does implement the rule of the shorter term. Copyright may extend on works created by French who died for France in World War II (more information), Russians who served in the Eastern Front of World War II (known as the Great Patriotic War in Russia) and posthumously rehabilitated victims of Soviet repressions (more information).
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

This file, which was originally posted to an external website, has not yet been reviewed by an administrator or reviewer to confirm that the above license is valid. See Category:License review needed for further instructions.

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current18:24, 11 March 2024Thumbnail for version as of 18:24, 11 March 20241,015 × 1,279 (1.04 MB)Rasbak (talk | contribs){{Information |description=Fig. 164. Distribution of presumptive organ regions (cell lineage) during cleavage in Ascaris. (After Durken: Experimental Analysis of Development. New York, W. W. Norton, based upon figures by Boveri and zur Strassen.) (A) Two-cell stage, showing primordial soma cell and first stem cell. (B) Two ectodermal cells. A and B. Soma cell, S,. is a mixture of mesoderm, stomodacum, and entoderm; second stem cell, P,. is a mixture of mesoderm and germ-cell material. The sym...

You cannot overwrite this file.

There are no pages that use this file.

Retrieved from "https://commons.wikimedia.org/w/index.php?title=File:Ascaris_distribution_of_presumptive_organ_regions_(cell_lineage)_during_cleavage.jpg&oldid=859661326"