Talk:Paper - The development of the cloaca in human embryos: Difference between revisions
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| No. 1 || [[:Category:Carnegie Embryo 12|12]]|| [[Carnegie stage 11]] || 2.1 mm|| transverse|| 10|| good|| Modelled by Mall ('97). Allantois of small lumen and in relation with the caudal border of the yolk sac. No evidences of a cloacal membrane. | | No. 1 || [[:Category:Carnegie Embryo 12|12]]|| [[Carnegie stage 11]] || 2.1 mm|| transverse|| 10|| good|| Modelled by Mall ('97). Allantois of small lumen and in relation with the caudal border of the yolk sac. No evidences of a cloacal membrane. | ||
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| No. 2 || [[:Category:Carnegie Embryo 391|391]] || [[Carnegie stage 10]] || 2.0 mm || transverse|| 10|| Good|| Appearance of hind gut. An interval of several sections between allantois and yolk sac. No cloacal membrane. | | No. 2 || [[:Category:Carnegie Embryo 391|391]] || [[Carnegie stage 10]] || 2.0 mm || transverse || 10|| Good|| Appearance of hind gut. An interval of several sections between allantois and yolk sac. No cloacal membrane. | ||
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| No. 3 || [[:Category:Carnegie Embryo 164|164]] | | No. 3 || [[:Category:Carnegie Embryo 164|164]]|| [[Carnegie stage 11]] || 3.5 mm || transverse || 20|| Good || [[:File:Pohlman1911 plate1A.jpg|Model A]]. x 100. Cloaca well developed and limited for caudal half of the ventral border by epithelial cloacal membrane. Allantois comes off at right angles and at lower border of dermal navel. Lateral furrow along later line of division. | ||
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| No. 4 || 209 | | No. 4 || 209|| 3.0 mm || transverse || 50|| Fair|| Relations about the same as the fore-going stage. Sections too thick for detailed study. [[Carnegie stage 12]] | ||
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| No. 5 || [[:Category:Carnegie Embryo 186|186]] | | No. 5 || [[:Category:Carnegie Embryo 186|186]]|| [[Carnegie stage 13]] || 3.5 mm|| transverse|| 20|| Good|| [[:File:Pohlman1911 plate1B.jpg|'''Model B''']]. x 100. Allantois wide lumened and no distinct line of demarkation from the ventral cloacal segment. Wolflian ducts have arrived but not as yet opened. Tail gut maximum of development. Probably the first signs of cloacal division. | ||
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| No. 6 || 87 | | No. 6 || 87|| 4.0 mm|| transverse|| 20|| Fair|| About the same as the foregoing. [[Carnegie stage 13]] | ||
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| No. 7 || 148 | | No. 7 || 148|| [[Carnegie stage 13]] || 4.3 mm || transverse || 10|| Good || x 100 Wolffian ducts open into cloaca. Allantois of small lumen. Ventral cloacal segment widening. Evidences of division quite apparent. | ||
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| No. 8 (Mall. 76 | | No. 8 (Mall. 76|| [[Carnegie stage 13]] || 4.5 mm || transverse || 20|| Good|| x 100. Widened ventral cloacal segment goes over indistinctly into allantois. Tail gut still quite large. Renal buds well developed. With exception of large allantois and wider tail gut, quite similar to Model C. | ||
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| No. 9 || [[:Category:Carnegie Embryo 80|80]] | | No. 9 || [[:Category:Carnegie Embryo 80|80]]|| [[Carnegie stage 14]] || 5.0 mm|| transverse || 10|| Good|| [[:File:Pohlman1911 plate2C.jpg|Model C]]. x 100. About the same as the foregoing stage. Tail gut undergoing degenerative changes. | ||
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| No. 10 || 371 | | No. 10 || 371|| 6.6 mm|| sagittal || 10|| Good|| Tail gut rudimentary. Development of cloaca and renal buds about the same as in no. 12. [[Carnegie stage 15]] | ||
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| No. 11 || 116 | | No. 11 || 116|| 5.0 mm || sagittal || 20|| Good|| x 100. Intracloacal epithelial plug well marked. Stage about the same as that found in no. 12. [[Carnegie stage 13]] | ||
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| No. 12 || [[:Category:Carnegie Embryo 2|2]] | | No. 12 || [[:Category:Carnegie Embryo 2|2]]|| [[Carnegie stage 15]] || 7.0 mm|| transverse|| 15|| Good|| [[:File:Pohlman1911 plate2D.jpg|Model D]] x 100. Marked development of renal buds. Kidney and ureter segments evident. Ventral cloacal segment much widened. Allantois of narrow lumen. Intracloacal epithelial plug marked. Tail gut maximum in length and slightly widened at caudal end. | ||
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| No. 13 || 241 | | No. 13 || 241|| [[Carnegie stage 15]] || 6.0mm|| transverse|| 10|| Goo(l|| Tailgutmore rudimentary than in no. 12. Cloacal membrane wide and shows intracloacal epithelial plug. Otherwise about the same as in no. 12. | ||
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| No. 14 || 383 | | No. 14 || 383|| [[Carnegie stage 16]] || 7.0 mm|| transverse," 10|| Good|| State similar to no. 12. Cloacal membrane intact. | ||
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| No. 15 || 397 | | No. 15 || 397|| [[Carnegie stage 16]] || 8.0 nma.|| transverse|| 10|| Good|| Similar to foregoing. | ||
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| No. 16 || 113 | | No. 16 || 113|| [[Carnegie stage 15]] || 8.0 mm|| sagittal|| 10= Fair|| x 100. Stage of cloacal division between than found in no. 12 and that found in no. 19. Cloacal membrane intact. Division of ureteral pelvis. Ureter segment elongated. | ||
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| No. 17 || 114 | | No. 17 || 114|| 10.0 mm|| sagittal|| 10|| Fair|| x 100. Stage of cloacal division about the same as the foregoing. Cloacal membrane intact. Kidney a little higher up. Upper and lower pelvis evident. | ||
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| No. 18 || [[:Category:Carnegie Embryo 109|109]] | | No. 18 || [[:Category:Carnegie Embryo 109|109]]|| [[Carnegie stage 18]] || 11.0 mm|| transverse|| 20|| Good|| Sections directly through lower part of cloacal region somewhat damaged. Otherwise about the same as no. 19. | ||
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| No. 19 || 221 | | No. 19 || 221|| [[Carnegie stage 16]] || 12.0 mm|| sagittal || 20|| Good|| [[:File:Pohlman1911 plate3E.jpg|Model E]] x 100. All traces of tail gut lost. Cloacal membrane somewhat depressed from surface. Cloacal segment of Wolffian duct shortened and opening of ureter and duct common into ventral cloacal segment. Beginning formation of genital eminence and lengthening of the ventral cloacal wall. Cloacal membrane intact. | ||
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| No. 20 || 175 | | No. 20 || 175|| 13.0 mm|| transverse|| 20|| Good|| x 100. Cloaca about divided. Complete double ureter. Orifices of lateral, and medial ureter and Wolffian duct at same level into cloaca. | ||
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| No. 21 || 353 || [[Carnegie stage 17]] || 11.0 mm | | No. 21 || 353 || [[Carnegie stage 17]] || 11.0 mm|| transverse|| 10|| Good|| Cloaca completely divided. Anal and urogenital membranes intact. Ureteral orifice independent and on level with Wolffian opening. | ||
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| No. 22 || 317 || [[Carnegie stage 18]] || 15.0 mm | | No. 22 || 317 || [[Carnegie stage 18]] || 15.0 mm|| coronal|| 20|| Good|| About the same stage as in no. 21. | ||
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| No. 23 || 350 | | No. 23 || 350|| 15.0 mm|| i||| 10|| Good|| About the same as the foregoing, and no. 24. | ||
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| No. 24 || 43 || [[Carnegie stage 19]] || 16.0mm | | No. 24 || 43 || [[Carnegie stage 19]] || 16.0mm|| sagittal || 50|| Good|| [[:File:Pohlman1911 plate3F.jpg|Model F]] . x 50. Anal and urogenital membranes separated. Genital eminence more marked. Ectodermic inclusion in furrow on caudal surface. Ureteral orifice on same level but some distance lateral to Wolffian orifice. | ||
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| No. 25 || 256 || [[Carnegie stage 20]] || 16.0 mm | | No. 25 || 256 || [[Carnegie stage 20]] || 16.0 mm|| sagittal || 50|| Good|| Urogenital sinus open to outside through rupture of urogenital membrane. Kidney nearly up to normal position and rotated. | ||
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| No. 26 || 296 || [[Carnegie stage 18]] || 7.0mm | | No. 26 || 296 || [[Carnegie stage 18]] || 7.0mm|| coronal|| 20|| Good|| Slightly older than above. Appearance of secondary genital folds at the sides of the phallus. | ||
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| No. 27 || [[:Category:Carnegie Embryo 128|128]] || [[Carnegie stage 21]] || 20.0 mm | | No. 27 || [[:Category:Carnegie Embryo 128|128]] || [[Carnegie stage 21]] || 20.0 mm|| coronal|| 50|| Good|| About same as above. | ||
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| No. 28 || 240 || [[Carnegie stage 20]] || 20.0 mm | | No. 28 || 240 || [[Carnegie stage 20]] || 20.0 mm|| coronal|| 20|| Good|| | ||
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| No. 29 || [[:Category:Carnegie Embryo 22|22]] || [[Carnegie stage 21]] || 20.0 mm | | No. 29 || [[:Category:Carnegie Embryo 22|22]] || [[Carnegie stage 21]] || 20.0 mm|| transverse|| 50|| Good|| One Mullerian duct has reached the urogenital sinus. | ||
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| No. 30 (Embryo KP | | No. 30 (Embryo KP|| 22.0 mm|| transverse|| 15|| Good|| X 66. Both Mullerian ducts at sinus. | ||
|} | |} |
Revision as of 23:40, 15 June 2016
Tabulation
Tabulation of Material. + for transverse: = for sagittal: || for coronal. The figures following indicate the thickness in microns.
- Online editor - Carnegie stages have been added to the original tabulation.
Embryo | Mall | Stage | CRL | Plane | Thickness (microns) | Quality | Notes |
---|---|---|---|---|---|---|---|
No. 1 | 12 | Carnegie stage 11 | 2.1 mm | transverse | 10 | good | Modelled by Mall ('97). Allantois of small lumen and in relation with the caudal border of the yolk sac. No evidences of a cloacal membrane. |
No. 2 | 391 | Carnegie stage 10 | 2.0 mm | transverse | 10 | Good | Appearance of hind gut. An interval of several sections between allantois and yolk sac. No cloacal membrane. |
No. 3 | 164 | Carnegie stage 11 | 3.5 mm | transverse | 20 | Good | Model A. x 100. Cloaca well developed and limited for caudal half of the ventral border by epithelial cloacal membrane. Allantois comes off at right angles and at lower border of dermal navel. Lateral furrow along later line of division. |
No. 4 | 209 | 3.0 mm | transverse | 50 | Fair | Relations about the same as the fore-going stage. Sections too thick for detailed study. Carnegie stage 12 | |
No. 5 | 186 | Carnegie stage 13 | 3.5 mm | transverse | 20 | Good | Model B. x 100. Allantois wide lumened and no distinct line of demarkation from the ventral cloacal segment. Wolflian ducts have arrived but not as yet opened. Tail gut maximum of development. Probably the first signs of cloacal division. |
No. 6 | 87 | 4.0 mm | transverse | 20 | Fair | About the same as the foregoing. Carnegie stage 13 | |
No. 7 | 148 | Carnegie stage 13 | 4.3 mm | transverse | 10 | Good | x 100 Wolffian ducts open into cloaca. Allantois of small lumen. Ventral cloacal segment widening. Evidences of division quite apparent. |
No. 8 (Mall. 76 | Carnegie stage 13 | 4.5 mm | transverse | 20 | Good | x 100. Widened ventral cloacal segment goes over indistinctly into allantois. Tail gut still quite large. Renal buds well developed. With exception of large allantois and wider tail gut, quite similar to Model C. | |
No. 9 | 80 | Carnegie stage 14 | 5.0 mm | transverse | 10 | Good | Model C. x 100. About the same as the foregoing stage. Tail gut undergoing degenerative changes. |
No. 10 | 371 | 6.6 mm | sagittal | 10 | Good | Tail gut rudimentary. Development of cloaca and renal buds about the same as in no. 12. Carnegie stage 15 | |
No. 11 | 116 | 5.0 mm | sagittal | 20 | Good | x 100. Intracloacal epithelial plug well marked. Stage about the same as that found in no. 12. Carnegie stage 13 | |
No. 12 | 2 | Carnegie stage 15 | 7.0 mm | transverse | 15 | Good | Model D x 100. Marked development of renal buds. Kidney and ureter segments evident. Ventral cloacal segment much widened. Allantois of narrow lumen. Intracloacal epithelial plug marked. Tail gut maximum in length and slightly widened at caudal end. |
No. 13 | 241 | Carnegie stage 15 | 6.0mm | transverse | 10 | Goo(l | Tailgutmore rudimentary than in no. 12. Cloacal membrane wide and shows intracloacal epithelial plug. Otherwise about the same as in no. 12. |
No. 14 | 383 | Carnegie stage 16 | 7.0 mm | transverse," 10 | Good | State similar to no. 12. Cloacal membrane intact. | |
No. 15 | 397 | Carnegie stage 16 | 8.0 nma. | transverse | 10 | Good | Similar to foregoing. |
No. 16 | 113 | Carnegie stage 15 | 8.0 mm | sagittal | 10= Fair | x 100. Stage of cloacal division between than found in no. 12 and that found in no. 19. Cloacal membrane intact. Division of ureteral pelvis. Ureter segment elongated. | |
No. 17 | 114 | 10.0 mm | sagittal | 10 | Fair | x 100. Stage of cloacal division about the same as the foregoing. Cloacal membrane intact. Kidney a little higher up. Upper and lower pelvis evident. | |
No. 18 | 109 | Carnegie stage 18 | 11.0 mm | transverse | 20 | Good | Sections directly through lower part of cloacal region somewhat damaged. Otherwise about the same as no. 19. |
No. 19 | 221 | Carnegie stage 16 | 12.0 mm | sagittal | 20 | Good | Model E x 100. All traces of tail gut lost. Cloacal membrane somewhat depressed from surface. Cloacal segment of Wolffian duct shortened and opening of ureter and duct common into ventral cloacal segment. Beginning formation of genital eminence and lengthening of the ventral cloacal wall. Cloacal membrane intact. |
No. 20 | 175 | 13.0 mm | transverse | 20 | Good | x 100. Cloaca about divided. Complete double ureter. Orifices of lateral, and medial ureter and Wolffian duct at same level into cloaca. | |
No. 21 | 353 | Carnegie stage 17 | 11.0 mm | transverse | 10 | Good | Cloaca completely divided. Anal and urogenital membranes intact. Ureteral orifice independent and on level with Wolffian opening. |
No. 22 | 317 | Carnegie stage 18 | 15.0 mm | coronal | 20 | Good | About the same stage as in no. 21. |
No. 23 | 350 | 15.0 mm | i | 10 | Good | About the same as the foregoing, and no. 24. | |
No. 24 | 43 | Carnegie stage 19 | 16.0mm | sagittal | 50 | Good | Model F . x 50. Anal and urogenital membranes separated. Genital eminence more marked. Ectodermic inclusion in furrow on caudal surface. Ureteral orifice on same level but some distance lateral to Wolffian orifice. |
No. 25 | 256 | Carnegie stage 20 | 16.0 mm | sagittal | 50 | Good | Urogenital sinus open to outside through rupture of urogenital membrane. Kidney nearly up to normal position and rotated. |
No. 26 | 296 | Carnegie stage 18 | 7.0mm | coronal | 20 | Good | Slightly older than above. Appearance of secondary genital folds at the sides of the phallus. |
No. 27 | 128 | Carnegie stage 21 | 20.0 mm | coronal | 50 | Good | About same as above. |
No. 28 | 240 | Carnegie stage 20 | 20.0 mm | coronal | 20 | Good | |
No. 29 | 22 | Carnegie stage 21 | 20.0 mm | transverse | 50 | Good | One Mullerian duct has reached the urogenital sinus. |
No. 30 (Embryo KP | 22.0 mm | transverse | 15 | Good | X 66. Both Mullerian ducts at sinus. |