Template:Human embryo Meyer 300 table: Difference between revisions

From Embryology
mNo edit summary
mNo edit summary
Line 29: Line 29:
! Remarks
! Remarks
|-
|-
| valign=top| 7 N.T. Fig. VI 1, VI r ind VI v.
| valign=top| 7 <br>N.T. Fig. VI 1, VI r ind VI v.
| valign=top| Gr. L. about 2.6 mm.
| valign=top| Gr. L. 2.5 mm.
| valign=top|  
| valign=top|  
| valign=top| Embryo bent over the ventral surface and slightly bent spirally.
| valign=top|  
| valign=top| Tail bud, on its ventral side doubtful remains of primitive streak.
| valign=top| Remains of primitive streak. Cloacal membrane.
| valign=top| 13-14 pairs of primitive segments.
| valign=top| 23 pairs of primitive segments.
| valign=top| Chorda emerging from entoderm, Cranially is still entoderm, caudally it is probably primarily independent of the entoderm and in this region it is no longer included in the entoderm.
| valign=top| Chorda separated from entoderm,
| valign=top| In brain region medullary canal is open to caudal to the region of the optic vesicle, similarly the caudal end. Anlagen of neuromeres already present.
| valign=top| Anterior neuropore closed. but its position still recognizable. Medullary canal stili wide open for a stretch caudally. Roof of 4th vent, beginning to thin out. Neuromeres. Trigeminus and acustico-facialis ganglia distinct.
| valign=top| Primary optic vesicles. They are close to the ectoderm; in their region the medullary canal is wide open.
| valign=top| Optic vesicles. Mesoderm between ectoderm and optic vesicle,
| valign=top| Anlage of auditory vesicle recognizable as a thickened and at first but little depressed plate of ectoderm.
| valign=top| Auditory vesicle almost closed (open through 4 or 5 sections of 5μ). Ductus endolymphaticus not yet visible.
|
|
| valign=top| Hypophysis just indicated.
| valign=top| Anlage doubtful.
| valign=top| Primary pharyngeal membrane still closed. Oral sinus.
| valign=top| Pharyngeal membrane just torn, still abundant remains of it.
| valign=top| Wide hepatic bay just cranial to the intestinal umbilicus. No trace yet of hepatic trabeculae.
| valign=top| Intestine still communicates widely with the yolk sack. Liver a thick-walled sack from which the trabeculse are beginning to bud.
| valign=top| The two first branchial pouches reach the ectoderm, the 3rd is formed.
| valign=top| The 3 anterior branchial pouches reacts the ectoderm; the 4th, though formed, does not. Thyreoidea mediana formed. Pulmotracheal groove. The paired condition of the pulmonary anlage already indicated.
| valign=top| Quite rudimentary "pronephric anlage" in 8th, 9th and 10 pairs of primitive segments. No trace yet of a Wolffian duct. Segmental vesicles in the 11th, 12th and 13th pairs of primitive segments.
| valign=top| Rudimentary "pronephric anlage"
| valign=top| Heart S-shaped. Posterior mesocardium through a few sections. Aorta paired throughout.
| valign=top| Heart S-shaped.
|
|
|
|
Line 51: Line 51:
| valign=top|  
| valign=top|  
| valign=top| Allantoic duct
| valign=top| Allantoic duct
| valign=top| Extirpation of uterus on account of carcinoma.
| valign=top| The embryo was obtained by operation.
|-  
|-  
| colspan=22| '''Remarks''' - Fixation formalin Muller's fluid. Stain Paracarmine. Sections 10 μ. Recent mitoses. Septum transverse. No ventral connection between pericardial and peritoneal cavities.
| colspan=22| '''Remarks''' - Abundant mitoses in the embryo. Fixation: ? Stain: Borax carmine. Sections: 5 μ. The embryo was modelled by Dr. Peter Thompson, Cf. Thompson, P., Description of a Human Embryo, etc., Joum. of Anat. and Phys., Vol. 41, 1907. Also Meyer, Rob., Ueber die Beziehung der Umierenkanal- chen zum Colomepithel, etc., Anat. Anz., Vol. 25, 1904;
|-
|-
| colspan=22| '''Reference:''' {{Ref-Keibel1908}}<br>Cited in: [[Book - Manual of Human Embryology 20|1912 Human Embryology]] and
| colspan=22| '''Reference:''' {{Ref-Keibel1908}}<br>Cited in: [[Book - Manual of Human Embryology 20|1912 Human Embryology]] and
{{Ref-Low1908}}
{{Ref-Thompson1907}}
|-bgcolor="F5FAFF"  
|-bgcolor="F5FAFF"  
| colspan=22| [[Book - Normal Plates of the Development of Vertebrates 8|'''1908 Embryo Tables''']]: [[Template:Human embryo Klb table|Klb]] ([[Carnegie stage 10|stage 10]]) | [[Template:Human embryo Pfannenstiel III table|Pfannenstiel III]] ([[Carnegie stage 11|stage 11]]) | [[Template:Human embryo Meyer 300 table|Meyer 300]] ([[Carnegie stage 12|stage 12]])
| colspan=22| [[Book - Normal Plates of the Development of Vertebrates 8|'''1908 Embryo Tables''']]: [[Template:Human embryo Klb table|Klb]] ([[Carnegie stage 10|stage 10]]) | [[Template:Human embryo Pfannenstiel III table|Pfannenstiel III]] ([[Carnegie stage 11|stage 11]]) | [[Template:Human embryo Meyer 300 table|Meyer 300]] ([[Carnegie stage 12|stage 12]])
|}<noinclude>[[Category:Template]][[Category:Table]][[Category:Human Embryo]][[Category:Historic Embryology]][[Category:Carnegie Stage 12]]</noinclude>
|}<noinclude>[[Category:Template]][[Category:Table]][[Category:Human Embryo]][[Category:Historic Embryology]][[Category:Carnegie Stage 12]]</noinclude>

Revision as of 12:39, 21 March 2017

Human Embryo No. 300
Collection of Dr. Robert Meyer, Berlin. Carnegie stage 12
Desig. Size Age Body form Primitive streak Primitive segments Chorda Nervous system Eye Ear Nose Hypophysis Mouth Digestive trac, liver and pancreas Branchial pouches, threoid thymus, trachea and lungs Urogenital system Heart and vessels Integument Skeleton Extremities Amnion Allantois Remarks
7
N.T. Fig. VI 1, VI r ind VI v. 		Gr. L. 2.5 mm. Remains of primitive streak. Cloacal membrane. 23 pairs of primitive segments. Chorda separated from entoderm, Anterior neuropore closed. but its position still recognizable. Medullary canal stili wide open for a stretch caudally. Roof of 4th vent, beginning to thin out. Neuromeres. Trigeminus and acustico-facialis ganglia distinct. Optic vesicles. Mesoderm between ectoderm and optic vesicle, Auditory vesicle almost closed (open through 4 or 5 sections of 5μ). Ductus endolymphaticus not yet visible. Anlage doubtful. Pharyngeal membrane just torn, still abundant remains of it. Intestine still communicates widely with the yolk sack. Liver a thick-walled sack from which the trabeculse are beginning to bud. The 3 anterior branchial pouches reacts the ectoderm; the 4th, though formed, does not. Thyreoidea mediana formed. Pulmotracheal groove. The paired condition of the pulmonary anlage already indicated. Rudimentary "pronephric anlage" Heart S-shaped. Allantoic duct The embryo was obtained by operation.
Remarks - Abundant mitoses in the embryo. Fixation: ? Stain: Borax carmine. Sections: 5 μ. The embryo was modelled by Dr. Peter Thompson, Cf. Thompson, P., Description of a Human Embryo, etc., Joum. of Anat. and Phys., Vol. 41, 1907. Also Meyer, Rob., Ueber die Beziehung der Umierenkanal- chen zum Colomepithel, etc., Anat. Anz., Vol. 25, 1904;
Reference: Keibel F. and Elze C. Normal Plates of the Development of the Human Embryo (Homo sapiens). (1908) Vol. 8 in series by Keibel F. Normal plates of the development of vertebrates (Normentafeln zur Entwicklungsgeschichte der Wirbelthiere) Fisher, Jena., Germany.
Cited in: 1912 Human Embryology and

Thompson P. Description of a human embryo of twenty-three paired somites. (1907) J Anat Physiol, 41(3):159-71. PMID 17232726

1908 Embryo Tables: Klb (stage 10) | Pfannenstiel III (stage 11) | Meyer 300 (stage 12)
Retrieved from ‘https://embryology.med.unsw.edu.au/embryology/index.php?title=Template:Human_embryo_Meyer_300_table&oldid=279372’
Powered by MediaWiki