File:Streeter1922-fig10.jpg - Revision history

Z8600021: /* Fig. 10. Reconstruction model of an embryo 12 mm long */

2020-01-21T21:19:59Z

Fig. 10. Reconstruction model of an embryo 12 mm long

← Older revision		Revision as of 08:19, 22 Ocak 2020
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	===Fig. 10. Reconstruction model of an embryo 12 mm long===		===Fig. 10. Reconstruction model of an embryo 12 mm long===

	No. ~~1121~~ Carnegie Collection. X 15.		Embryo No. {{CE1121}} Carnegie Collection. X 15.


	Between the stages of 10 and 14 mm. there is rapid progress in the formation of the face, as can be seen by comparing figures 10 and 11.		Between the stages of 10 and 14 mm. there is rapid progress in the formation of the {{face}}, as can be seen by comparing figures 10 and 11.

	[[:File:Streeter1922-fig11.jpg\|Figure 11]] is drawn from a model to show the details of the face region and the topography of the auricular area, the latter shown in blue. The mouth at this time is fairly well outlined, and one can recognize the region between it and the auricular area which is to form the cheek and jaw. As this region enlarges it will result in the further lateral and dorsal displacement of the auricular area. In the preceding stages the latter still extended downward on the ventral surface of the head, whereas now it is entirely on the lateral surface, and the whole area can be seen in a profile view of the embryo. At this stage the six auricular hillocks show their maximum prominence. The three mandibular hillocks, which at first covered a large part of the mandibular bar, now cover only its caudal margin. The three hyoid hillocks still represent the whole surface of the hyoid bar excepting that part which has been molded into the first cleft. It can be seen in figure 11 that this cleft is much wider than in the younger stages, and we can now speak of a distinct fossa angularis. The ventral third of this fossa becomes relatively deeper to form the external auditory meatus, while the remainder is eventually taken up in the formation of the auricle.		[[:File:Streeter1922-fig11.jpg\|Figure 11]] is drawn from a model to show the details of the face region and the topography of the auricular area, the latter shown in blue. The mouth at this time is fairly well outlined, and one can recognize the region between it and the auricular area which is to form the cheek and jaw. As this region enlarges it will result in the further lateral and dorsal displacement of the auricular area. In the preceding stages the latter still extended downward on the ventral surface of the head, whereas now it is entirely on the lateral surface, and the whole area can be seen in a profile view of the embryo. At this stage the six auricular hillocks show their maximum prominence. The three mandibular hillocks, which at first covered a large part of the mandibular bar, now cover only its caudal margin. The three hyoid hillocks still represent the whole surface of the hyoid bar excepting that part which has been molded into the first cleft. It can be seen in figure 11 that this cleft is much wider than in the younger stages, and we can now speak of a distinct fossa angularis. The ventral third of this fossa becomes relatively deeper to form the external auditory meatus, while the remainder is eventually taken up in the formation of the auricle.
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	[[Category:Human]] [[Category:Hearing]] [[Category:Carnegie Embryo 1121]]		[[Category:Human]] [[Category:Hearing]] [[Category:Carnegie Embryo 1121]]
			[[Category:Carnegie Stage 16]]

Z8600021: /* Fig. 10. Reconstruction model of an embryo 12 mm long */

2013-01-27T03:47:08Z

Fig. 10. Reconstruction model of an embryo 12 mm long

← Older revision		Revision as of 14:47, 27 Ocak 2013
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	No. 1121 Carnegie Collection. X 15.		No. 1121 Carnegie Collection. X 15.


			Between the stages of 10 and 14 mm. there is rapid progress in the formation of the face, as can be seen by comparing figures 10 and 11.

			[[:File:Streeter1922-fig11.jpg\|Figure 11]] is drawn from a model to show the details of the face region and the topography of the auricular area, the latter shown in blue. The mouth at this time is fairly well outlined, and one can recognize the region between it and the auricular area which is to form the cheek and jaw. As this region enlarges it will result in the further lateral and dorsal displacement of the auricular area. In the preceding stages the latter still extended downward on the ventral surface of the head, whereas now it is entirely on the lateral surface, and the whole area can be seen in a profile view of the embryo. At this stage the six auricular hillocks show their maximum prominence. The three mandibular hillocks, which at first covered a large part of the mandibular bar, now cover only its caudal margin. The three hyoid hillocks still represent the whole surface of the hyoid bar excepting that part which has been molded into the first cleft. It can be seen in figure 11 that this cleft is much wider than in the younger stages, and we can now speak of a distinct fossa angularis. The ventral third of this fossa becomes relatively deeper to form the external auditory meatus, while the remainder is eventually taken up in the formation of the auricle.



	Plate 1. Ventrolateral view of the head in a series of human embryos [[:File:Streeter1922-fig09.jpg\|Fig. 9. Embryo 6 mm]] \| [[:File:Streeter1922-fig10.jpg\|Fig. 10. Embryo 12 mm]] \| [[:File:Streeter1922-fig11.jpg\|Fig. 11. Embryo 14 mm]] \| [[:File:Streeter1922-fig12.jpg\|Fig. 12. Embryo 18 mm]]		Plate 1. Ventrolateral view of the head in a series of human embryos [[:File:Streeter1922-fig09.jpg\|Fig. 9. Embryo 6 mm]] \| [[:File:Streeter1922-fig10.jpg\|Fig. 10. Embryo 12 mm]] \| [[:File:Streeter1922-fig11.jpg\|Fig. 11. Embryo 14 mm]] \| [[:File:Streeter1922-fig12.jpg\|Fig. 12. Embryo 18 mm]]

Z8600021 at 00:55, 27 Ocak 2013

2013-01-27T00:55:13Z

← Older revision		Revision as of 11:55, 27 Ocak 2013
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	No. 1121 Carnegie Collection. X 15.		No. 1121 Carnegie Collection. X 15.

	Plate 1. Ventrolateral view of the head in a series of human embryos		Plate 1. Ventrolateral view of the head in a series of human embryos [[:File:Streeter1922-fig09.jpg\|Fig. 9. Embryo 6 mm]] \| [[:File:Streeter1922-fig10.jpg\|Fig. 10. Embryo 12 mm]] \| [[:File:Streeter1922-fig11.jpg\|Fig. 11. Embryo 14 mm]] \| [[:File:Streeter1922-fig12.jpg\|Fig. 12. Embryo 18 mm]]

	Ventrolateral view of the head in a series of human embryos, showing the change in topography of the auricle in the course of its development. The surface area of the mandibular and hyoid bars entering into the formation of the auricular primordium is colored blue. These figures show the lateral and dorsal migration of the auricle coincident with the formation of the mandible.		Ventrolateral view of the head in a series of human embryos, showing the change in topography of the auricle in the course of its development. The surface area of the mandibular and hyoid bars entering into the formation of the auricular primordium is colored blue. These figures show the lateral and dorsal migration of the auricle coincident with the formation of the mandible.
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	{{Template:Historic Disclaimer}}		{{Template:Historic Disclaimer}}

	[[Category:Human]] [[Category:Hearing]]		[[Category:Human]] [[Category:Hearing]] [[Category:Carnegie Embryo 1121]]

Z8600021: ===Fig. 10. Reconstruction model of an embryo 12 mm long=== No. 1121 Carnegie Collection. X 15. Plate 1. Ventrolateral view of the head in a series of human embryos Ventrolateral view of the head in a series of human embryos, showing the change in topo

2013-01-27T00:43:32Z

New page

===Fig. 10. Reconstruction model of an embryo 12 mm long===

No. 1121 Carnegie Collection. X 15.

Plate 1. Ventrolateral view of the head in a series of human embryos

Ventrolateral view of the head in a series of human embryos, showing the change in topography of the auricle in the course of its development. The surface area of the mandibular and hyoid bars entering into the formation of the auricular primordium is colored blue. These figures show the lateral and dorsal migration of the auricle coincident with the formation of the mandible.

{{Streeter1922}}

{{Template:Historic Disclaimer}}

[[Category:Human]] [[Category:Hearing]]