The primitive streak and notochordal canal in Chelonia (Description of Plate II) BHL4780733

RMID:KAYH0A

Preview

Buy the print

Image details

Contributor:

Historic Collection / Alamy Stock Photo

Image ID:

KAYH0A

File size:

7.1 MB (324.3 KB Compressed download)

Releases:

Model - no | Property - noDo I need a release?

Dimensions:

1225 x 2040 px | 20.7 x 34.5 cm | 8.2 x 13.6 inches | 150dpi

More information:

This image is a public domain image, which means either that copyright has expired in the image or the copyright holder has waived their copyright. Alamy charges you a fee for access to the high resolution copy of the image.

This image could have imperfections as it’s either historical or reportage.

Search stock photos by tags

ancient art book copy space cover drawing editorial editorial photography historic history horizontal illustration line drawing map news old painting photo photograph stock stock photography textbook vintage water

Similar stock images

RMKAYH0B–The primitive streak and notochordal canal in Chelonia (Plate II) BHL4780734

RM2JP7EXR–The primitive streak and notochordal canal in Chelonia (Plate IX)

RMREF8FN–. Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illus. Vertebrates -- Embryology; Comparative embryology. GASTRULATION IN VARIOUS CHORDATA 419 fronj the upper or external opening to the archenteric space which lies below the notochord and entoderm (fig. 200B, E). Posterior to the opening of the notochordal canal is the thickened primitive plate (primitive streak), composed of converged presumptive mesodermal cells (fig. 199). This converged mass of cells involutes to the inside along the lateral borders of the notochordal canal and also posterior to t

RMKAYH0X–The primitive streak and notochordal canal in Chelonia (Plate IX) BHL4780762

RM2JP7F0B–The primitive streak and notochordal canal in Chelonia (Plate X)

RMRDJY8K–. The primitive streak and notochordal canal in Chelonia. Embryology; Chelonia (Genus). Regression of the Neurenteric Canal along the Streak. 41 space they enclose equals in width the lateral extent of the open portion of the blastopore. Indeed, these two depressions are the posterior extensions or horns of the crescentic portion of the open blastopore. As this process of sinking continues, the central area by degrees falls lower and lower, until it reaches the level of the floor of the notochordal canal, at which level it disappears. That portion which is going to form the dorsal wall of the

RMKAYH0H–The primitive streak and notochordal canal in Chelonia (Plate V) BHL4780746

RM2JP7EYB–The primitive streak and notochordal canal in Chelonia (Plate IV)

RMRE0E2E–. A laboratory manual and text-book of embryology. Embryology. 42 SEGMENTATION OF THE FERTILIZED OVUM ing from the dorsal surface of the germinal area into the space beneath the ento- derm, the archenteron. No gastrulation stage for the human embryo has yet been observed but the primitive streak may be recognized in later stages (Fig. 73 A). There is also evidence of an opening, the notochordal or neurenteric canal, leading from the exterior into the cavity of the primitive gut (archenteron). According to the view of Keibel and Hubrecht, the invagination of cells to form the noto- chordal plat

RMKAYH13–The primitive streak and notochordal canal in Chelonia (Plate XI) BHL4780770

RM2JP7F24–The primitive streak and notochordal canal in Chelonia (Plate XI)

RMREF8FX–. Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illus. Vertebrates -- Embryology; Comparative embryology. NOTOCHORD ^.. INTERNAL OPENING 0 F NOTOCHORDAL CANAL EXTERNAL OF OPENING NOTOCHORDAL CANAL^ PRIMITIVE STREAK c. Fig. 199. Surface views of blastoderm of the turtle, Chrysemys picta, during gastrula- tion. Darkened area in the center shows the embryonic shield, the region of the noto- chordal canal in the area of the primitive plate. (A) Young gastrula. External opening of notochordal canal is wide. (B) Later gastrula. External opening of notochord

RMKAYH09–The primitive streak and notochordal canal in Chelonia (Plate I) BHL4780730

The primitive streak and notochordal canal in Chelonia (Description of Plate II) BHL4780733

Image details

Search stock photos by tags

Get great features with your free account

Get inspired for your next project!