Wikimedia Commons

File:Abatus cordatus Post-gastrular stage.jpg

Original file ‎(930 × 1,284 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 Figure 8. Post-gastrular stage of Abatus cordatus. (A) Developing vestibule of a newly hatched embryo (SEM). (B) Cross section through the animal part of an 80-day-old embryo. The vestibule is isolated from the embryonic epithelium and has grown in the mesenchyme. Future primary podia differentiate on the floor of the oral cavity (external fold). At this stage the future nervous system begins to be visible (internal fold). The embryonic gut is suspended in the coelomic cavity by mesenteries. (C) Cross section of a 100day-old embryo. The vestibule is at its maximal size. (D) Detail of the black box in Fig. 8b showing an outgrowth (arrow) of the ceiling of the vestibule towards the external epithelium. (E) Late embryo (110 days old). The vestibule has opened (arrow). Details of the oral-surface-like buds of podia or spines are visible through its very thin ceiling (light micrograph). (F) Cross section through the opening (arrows) of the vestibule of a 100-day-old embryo. B to D are semi-thin plastic sections (toluidine blue, pH 11.5). F is an autoradiographic semi-thin plastic section (toluidine blue, pH 11.5; see Schatt, 1988). Abbreviations: amp, primary podia: ap, animal pole; cc, coelomic cavity; de, endoderm that will give the digestive epithelium; dl, digestive lumen; ect, ectoderm; em, embryo; eme, embryonic epithelium; m, mesentery; mes, mesenchyme; V, vestibule; vp, vegetal pole. Scale bar = A, 100 um; B and F, 250 um; C and E, 500 um; D, 10 um.
Date
Source https://archive.org/details/biologicalbullet1901996lill/page/35/mode/1up?view=theater The Biological bulletin. Marine Biological Laboratory (Woods Hole, Mass. ). Annual report; HighWire Press.
Author Lillie, Frank Rattray, Moore, Carl Richard, Redfield, Alfred Clarence.

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
current18:25, 25 March 2024Thumbnail for version as of 18:25, 25 March 2024930 × 1,284 (1.04 MB)Rasbak (talk | contribs){{information |description=Figure 8. Post-gastrular stage of Abatus cordatus. (A) Developing vestibule of a newly hatched embryo (SEM). (B) Cross section through the animal part of an 80-day-old embryo. The vestibule is isolated from the embryonic epithelium and has grown in the mesenchyme. Future primary podia differentiate on the floor of the oral cavity (external fold). At this stage the future nervous system begins to be visible (internal fold). The embryonic gut is suspended in the coelo...

You cannot overwrite this file.

Retrieved from "https://commons.wikimedia.org/w/index.php?title=File:Abatus_cordatus_Post-gastrular_stage.jpg&oldid=866158279"