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Human Embryo Carnegie Stage 15

Carnegie Collection Embryo No. 3441

Facts: Week 5, 35 - 38 days, 7 - 9 mm

View: Lateral left view. Amniotic membrane removed.

Events:

ectoderm: sensory placodes, lens pit, otocyst, nasal pit, primary/secondary vesicles, fourth ventricle of brain,

mesoderm: heart prominence

head: 1st, 2nd and 3rd pharyngeal arch, forebrain, site of lens placode, site of otic placode, stomodeum

Body: heart, liver, umbilical cord, mesonephric ridge

Limb: upper and lower limb buds, hand plate

Identify: midbrain region, nasal pit, lens pit, 1st, 2nd and 3rd pharyngeal arches, 1st pharyngeal groove, maxillary and mandibular components of 1st pharyngeal arch, fourth ventricle of brain, heart prominence, cervical sinus, upper limb bud, mesonephric ridge, lower limb bud, umbilical cord

Historic Papers: 1891 | 1905 Cranial and Spinal Nerves | 1914 | 1926 Precervical Sinus | 1948 stages 15-18

Week:	1	2	3	4	5	6	7	8
Carnegie stage:	1 2 3 4	5 6	7 8 9	10 11 12 13	14 15	16 17	18 19	20 21 22 23

Serial No.	Size (mm)	Grade	Fixative	Embedding Medium	Plane	Thinness (µm)	Stain	Year	Notes
3441	E,8.0 Ch., 25x24x20	Good	Formol	Paraffin	Sagittal	10	Al. coch.	1921

Carnegie Collection Embryos - Stage 15
Serial No.	Size (mm)	Grade	Fixative	Embedding Medium	Plane	Thinness (µm)	Stain	Year	Notes
2	E., 7.0 Ch., 25x25x25	Good	Alc.	P	Transverse	15	Al. carm.	1888	Least-advanced third
88	E.,8 Ch., 30x28x15	Poor	Alc.	P	Coronal	P	Al. coch.	1897
113	E.,8 241 E,6.0	Poor	P	p	Sagittal	10	Borax carmine	?
241	E,6.0	Good	Formalin	P	Transverse	10	H. & Congo red	1904
371	E,6.6	Good	Formalin	P	Sagittal	10	Al. coch.	1913	Shrunken and cracked
389	E., 9	Poor	p	p	Sagittal	20	(Stain - Haematoxylin Eosin)	1907	Tubal
721	E., 9.0 Ch., 30x20x10	Exc.	Zenker formol	P	Transverse	15	(Stain - Haematoxylin Eosin)	1913	Median in group
810	E., 7.0 Ch, 30x25x15	Good	Alc.	P	Sagittal	20	Al. coch	1913
855	E.,7.5	Poor	Formalin	P	Transverse	100	Al. coch.	1914	Pathological between limbs
1006	E,9.0 Ch., 37x26x22	Poor	Formalin	P	Coronal	20	(Stain - Haematoxylin Eosin) or. G.	1914	Operative. Most-advanced third
1091	E,7.2 Ch., 28x26x20	Poor	P	P	Coronal	20	Al. coch.	1915	Macerated
1354	E,7.8 Ch, 35x30x25	Good	Formalin	P	Sagittal	20	Al. coch.	1916	Least-advanced third
1767	E , 11.0 Ch, 41x23x5	Good	Formalin	P	Sagittal	40	(Stain - Haematoxylin Eosin) or. G.	1917	Most-advanced third
2743	E., 7.2 Ch., 19xl8x14	Poor	Formalin	P	Transverse	20	Al. coch.	1919	Macerated. Least-advanced third
3216	E, 6.5 Ch, 30x30x5	Good	Formalin	P	Transverse	20	Al. coch.	1920	Hysterectomy. Least-advanced third
3385	E,83 Ch., 25x20x16	Exc.	Corros. acetic	P	Trans.	20	(Stain - Haematoxylin Eosin) or. G.	1921	Some sections lost. Most-advanced third. Ag added
3441	E,8.0 Ch., 25x24x20	Good	Formalin	P	Sag.	10	Al. coch.	1921
3512	E,8,5 Ch., 33x28x25	Good	Formalin	P	Trans.	10	Al. coch.	1921
3952	E,6,7 Ch., 30x25x15	Good	Formalin	P	Cor.	15	Al. coch.	1922	Median in group
4602	E,9.3 Ch,, 33x30x26	Good	Formalin	P	Sag.	15	Al. coch.	1924	Medical abortion
4782	E,9.0 Ch., I4xl3x11	Poor	Formalin	P	Cor.	20	Al. coch.	1924
5772	E, 8	Poor	?	P	Cor.	15	Al. coch. eosin	1928
Template:CE5?92	E, 3	Good	Corros. acetic	C-P	Cor.	10	Al. coch. phlox	1929	Transitional to next stage
6223	E ?	Poor	Alc.	C-P	Sag.	8	Or. G.	1930	Fragmented sections. Not saved
6504
6506
6508
6595
????
Abbreviations Size - E. is the greatest length of the embryo and Ch. is the mean diameter of the chorion. Grade - total grade of the specimen and includes both its original quality and the condition of the mounted sections. Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P). Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin (Bouin solution) ? - unknown or not determined.

Carnegie Stages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | About Stages | Timeline

Cite this page: Hill, M.A. (2024, April 19) Embryology Stage15 bf10.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Stage15_bf10.jpg

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	12:22, 7 August 2011		448 × 600 (28 KB)	S8600021 (talk \| contribs)	==Human Embryo Carnegie Stage 15== Carnegie Collection Embryo No.3441 Facts: Week 5, 35 - 38 days, 7 - 9 mm View: Lateral left view. Amniotic membrane removed. Events Ectoderm: sensory placodes, lens pit, otocyst, nasal pit, primary/secondary vesicles

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@@ Line 1: / Line 1: @@
 ==Human Embryo Carnegie Stage 15==
-Carnegie Collection Embryo No.3441
+Carnegie Collection Embryo No. {{CE3441}}
 Facts: Week 5, 35 - 38 days, 7 - 9 mm
@@ Line 6: / Line 6: @@
 View: Lateral left view. Amniotic membrane removed.
-Events
+Events:
-Ectoderm: sensory placodes, lens pit, otocyst, nasal pit, primary/secondary vesicles, fourth ventricle of brain,
+{{Ectoderm}}: sensory placodes, lens pit, otocyst, nasal pit, primary/secondary vesicles, fourth ventricle of brain,
-Mesoderm: heart prominence
+{{Mesoderm}}: heart prominence
-Head: 1st, 2nd and 3rd pharyngeal arch, forebrain, site of lens placode, site of otic placode, stomodeum
+{{Head}}: 1st, 2nd and 3rd pharyngeal arch, forebrain, site of lens placode, site of otic placode, stomodeum
 Body: heart, liver, umbilical cord, mesonephric ridge
@@ Line 22: / Line 22: @@
 {{Carnegie Embryo Stage15}}
-{{Template:Carnegie_stages}}
+{| class="wikitable"
+|-
+! Serial No. !! Size (mm) !! Grade !! Fixative !! Embedding Medium !! Plane !! Thinness (µm) !! Stain  !! Year !! Notes
+|-
+| {{CE3441}} ||  E,8.0 Ch., 25x24x20 || Good ||  Formol || Paraffin || {{Sagittal}} ||  10 ||  Al. coch. || 1921 ||
+|}
-{{Template:Footer}}
+{{Carnegie Collection stage 15 table}}
-[[Category:Carnegie Stage 15]] [[Category:Week 5]]
+{{Carnegie_stages}}
+{{Footer}}
+[[Category:Carnegie Stage 15]] [[Category:Week 5]] [[Category:Carnegie Embryo 3441]]