Template:Human embryo Pfannenstiel III table
From Embryology
| Human Embryo Pfannenstiel III | ||||||||||||||||||||||
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| Collection of Prof. Pfannenstiel, Giessen. Carnegie stage 11 | ||||||||||||||||||||||
| 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 |
| 6 Pfannenstiel III Fig. Vr and Vv. Textfig. 6a to 6w. | Gr. L. about 2.6 mm. | Embryo bent over the ventral surface and slightly bent spirally. | Tail bud, on its ventral side doubtful remains of primitive streak. | 13-14 pairs of primitive segments. | 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. | 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. | Primary optic vesicles. They are close to the ectoderm; in their region the medullary canal is wide open. | Anlage of auditory vesicle recognizable as a thickened and at first but little depressed plate of ectoderm. | Hypophysis just indicated. | Primary pharyngeal membrane still closed. Oral sinus. | Wide hepatic bay just cranial to the intestinal umbilicus. No trace yet of hepatic trabeculae. | The two first branchial pouches reach the ectoderm, the 3rd is formed. | 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. | Heart S-shaped. Posterior mesocardium through a few sections. Aorta paired throughout. | Allantoic duct | Extirpation of uterus on account of carcinoma. | ||||||
| Remarks - Fixation formalin Muller's fluid. Stain Paracarmine. Sections 10 μ. Recent mitoses. Septum transverse. No ventral connection between pericardial and peritoneal cavities. | ||||||||||||||||||||||
| 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 Low A. Description of a human embryo of 13-14 mesodermic somites. (1908) J Anat Physiol. 42(3): 237-51. PMID 17232769 | PMC1289161 | ||||||||||||||||||||||
| 1908 Embryo Tables: Klb (stage 10) | Pfannenstiel III (stage 11) | Meyer 300 (stage 12) | Strahl 4mm (stage 13) | Hertwig G31 (stage 14) | ||||||||||||||||||||||
