File:Ascaris megalocephala Segmenting egg in the 102-cell stage seen from beneath.jpg

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

Original file ‎(911 × 862 pixels, file size: 494 KB, MIME type: image/jpeg)

Captions

Captions

Add a one-line explanation of what this file represents

Summary[edit]

Description

Fig, 349.—Segmenting egg of Ascaris megalocephala in the 102-cell stage seen from beneath. (After Müller,)

All the ectoderm cells which are descendants of AB have a light tone—the descendants of A and those of B are not distinguished from one another. blp, blastopore. U, the front row of tail cells descendants of C, which bend up so as to form a U.- A similar U in front of this one is formed by the descendants of D (d1, d2, δ1, δ2) and gives rise to mesoderm.

P4 divides into an anterior G1, and a posterior G2. These two cells remain quiescent and undergo no further division until after the larva is hatched and the development of the genital organs is begun.

st cells form the stomodaeum.
Date
Source https://archive.org/details/cu31924024787040/page/445/mode/1up?view=theater Text-book of embryology. London : Macmillan.
Author MacBride, E. W.

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
current11:05, 30 March 2024Thumbnail for version as of 11:05, 30 March 2024911 × 862 (494 KB)Rasbak (talk | contribs){{information |description=Fic, 349.—Segmenting egg of Ascaris megalocephala in the 102-cell stage seen from beneath. (After Müller,) All the ectoderm cells which are descendants of AB have a light tone—the descendants of A and those of B are not distinguished from one another. blp, blastopore. U, the front row of tail cells descendants of C, which bend up so as to form a U.- A similar U in front of this one is formed by the descendants of D (d<sub>1</sub>, d<sub>2</sub>, δ<sub>1</sub>, δ<su...

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_megalocephala_Segmenting_egg_in_the_102-cell_stage_seen_from_beneath.jpg&oldid=864347402"