File:Wen1928-Fig10.jpg

From Embryology

Original file(495 × 1,200 pixels, file size: 108 KB, MIME type: image/jpeg)

Fig. 10. A graph of the neural crest of the 17-somite embryo H951

Showing the relation of the number of crest cells to somite levels. The position of the somites was plotted on millimeter paper and then the number of crest cells in each section was counted with an immersion lens and plotted in appropriate position. The stippled area accordingly indicates only the number of crest cells, not their peripheral spread.


4. Spinal neural crest. For the sake of convenience in dealing with the neural crest of the 17—somite embryo caudal to rh. 7, we have arbitrarily included the crest element rostral to the third pair of somites in the spinal region, although anything in front of that level is to be regarded as belonging to the occipital region of the head. Histologically, only a few crest cells can be identified immediately caudal to the vagal neural crest. Definite crest swarms cannot be recognized until the upper border of the 1st somite is reached, whence they can be followed caudally as far as the intersegmental space of the 11th to 12th somites on the left and the cranial border of the 13th somite on the right side of the embryo. Beyond this point no crest cell can be found (fig. 10).


Abbreviations for all Figures
  • A.car.int., internal carotid artery
  • A.seg.dor., dorsal segmental arteries
  • A.urnb.d.-s., umbilical artery, right, left
  • All., allantois
  • Am., amnion
  • An.ao., aortic anastomosis
  • Ao.dor.d.-s., dorsal aorta, right, left
  • Ar.ao.d.-s.,I, II, aortic arches, right, left, I, II
  • Area br.III,IV, ectodermal areas of third or fourth visceral pouches
  • Area hy., ectodermal area of hyoid arch
  • Area P prin., principal trigeminal area (or the ectodermal area of placodal contributions)
  • Area mand., mandibular area
  • Area ophth, ophthalmic area
  • Atr.d.s., atrium, right, left
  • Atr.canal., atrial canal
  • Br.int.d.-s., internal gill rudiment, right, left
  • Bulb.ao., aortic bulb
  • Bulb.cor., bulbus cordis
  • Ch.dor., chorda dorsalis
  • Ch.sp., chorda spinalis
  • Coel., coelom
  • Coel.epith., coelomic epithelium
  • Coel.per., pericardial coelom
  • Cor, site of heart
  • Cr.neur.V, trigeminal neural crest
  • Cr.neur.VII—VIII, acousticofacial neural crest
  • Cr.neur.IX—X, glossopharyngeal vagal neural crest
  • Dien., diencephalon
  • Disc.inc., discus incepts
  • Disc.V, trigeminal area where the ectoderm fused with the underlying tissue (neural crest?)
  • Disc.VII, facial epibranchial placode
  • Disc.IX, glossopharyngeal epibranchial placode
  • Disc.X, vagal epibranchial placode
  • Duct.proneph., pronephric duct, primary excretory duct
  • Ect., ectoderm
  • Endocard., endocardium
  • Ent., entoderm
  • Pos.pre-op., preoptic fossa
  • Hep, primordium of liver (both medial and lateral thickening)
  • Inf., infundibulum
  • Int.caud., hindgut
  • Int.atr.sul., interatrial sulcus
  • Isth., isthmus
  • Memb.br.I, II, III, first, second or third branchial membranes.
  • Memb.buc., buccopharyngeal membrane
  • Memb.cl., cloacal membrane
  • Meschy., mesenchyme
  • Mesen, mesencephalon
  • Myocard., myocardium
  • Neph., nephrostome
  • Neu.ant., anterior neuropore
  • Ph., pharynx
  • Pli.ph.vent.d.-s.1,2, ventral pharyngeal fold, right, left, first, or second
  • Port.int.ant., anterior intestinal portal
  • Pr.pul., primordium of lung
  • Prec-h.pl., prechordal plate
  • Prosen., prosencephalon
  • Proc.mand., mandibular process
  • Prom.cor., heart swelling (Davis)
  • R.ao.d0r.1, 2, etc., first, second, etc., presegmental aortic branch
  • R.ao.lat., lateral aortic branch
  • R.ao.vent., ventral aortic branch
  • Res.pre.op., preoptic recess (Johnston)
  • Rh.1, .9, 3, 4, 5, 6, 7, rhombomere 1, 2, 3, 4, 5, 6, 7
  • S.1,2, etc., first, second, etc., somite
  • S.ven., sinus vesous
  • Sac.br.I, II, III, first, second, third pharyngeal pouch
  • Sac.vit., yolk sac
  • Sect, section
  • Sept.tr., septum transversum
  • Sul.di-mesen., dimesencephalic boundary
  • Sul.la., laryngotracheal sulcus
  • Sul.op., optic sulcus
  • Tel., telencephalon
  • Thy;., primordium of thyroid gland
  • Tor.op., torus opticus (Froriep)
  • Tub.proneph., pronephric tubule
  • V.cap.prim., primitive head vein
  • V.card.ant., anterior cardinal vein
  • V.card.com., common cardinal vein
  • Vent.cord., ventricle of heart
  • Ves.mesoneph., mesonephric vesicle
  • Ves.op., optic vesicle
  • Ves.ot., otic vesicle
  • Ves.proneph., pronephric vesicle
Historic Disclaimer - information about historic embryology pages 
Mark Hill.jpg
Pages where the terms "Historic" (textbooks, papers, people, recommendations) appear on this site, and sections within pages where this disclaimer appears, indicate that the content and scientific understanding are specific to the time of publication. This means that while some scientific descriptions are still accurate, the terminology and interpretation of the developmental mechanisms reflect the understanding at the time of original publication and those of the preceding periods, these terms, interpretations and recommendations may not reflect our current scientific understanding.     (More? Embryology History | Historic Embryology Papers)
Links: fig 1 | Plate 2 | fig 2 | fig 3 | fig 4 | fig 5 | fig 6 | fig 7 | fig 8 | fig 9 | fig 10 | fig 11 | fig 12 | fig 13 | fig 14 | fig 15 | fig 16 | fig 17 | fig 18 | fig 19 | fig 21 | fig 21 | fig 22 | fig 23 | fig 24 | fig 25 | fig 26 | fig 27 | fig 28 | fig 29 | Wen 1928 | Carnegie stage 11 | Carnegie stage 12 | Historic Papers

Reference

Wen IC. The anatomy of human embryos with seventeen to twenty-three pairs of somites (1928) J. Comp. Neural., 45: 301-376.


Cite this page: Hill, M.A. (2024, May 28) Embryology Wen1928-Fig10.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Wen1928-Fig10.jpg

What Links Here?
© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

File history

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

Date/TimeThumbnailDimensionsUserComment
current15:37, 20 April 2016Thumbnail for version as of 15:37, 20 April 2016495 × 1,200 (108 KB)Z8600021 (talk | contribs){{Wen1928 figures}}