File:Bailey305.jpg - Revision history

Z8600021 at 22:39, 18 September 2012

2012-09-18T22:39:16Z

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	{{Template:Bailey 1921 Figures}}		{{Template:Bailey 1921 Figures}}

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2011-09-19T07:49:52Z

← Older revision		Revision as of 18:49, 19 September 2011
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			==Fig. 305. Transverse section of a dog embryo with 19 primitive segments==

			Bonnet.

			* Section taken through sixth segment.
			* The pronephric tubules are but transient structures and have no functional significance in man and the higher Vertebrates.
			* The ducts, however, remain and become the ducts of the second set of urinary organs, the mesonephroi.
			* primitive segments = somites.

			The pronephros, with the pronephric duct, is the first of the urinary organs to appear. In embryos of 2-3 mm. there are two pronephric tubules on each side, situated at the level of the heart. Although their mode of origin has not been observed in the human embryo, it is probable, judging from observations on lower Vertebrates, that they arise as evaginations of the mesothelium. The part of the mesothelium involved is that adjacent to the intermediate cell mass (Fig. 305) .

	{{Template:Bailey 1921 Figures}}		{{Template:Bailey 1921 Figures}}

	[[Category:Human]] [[Category:Renal]]		[[Category:Human]] [[Category:Renal]]

2011-01-25T01:11:03Z

uploaded a new version of "File:Bailey305.jpg"

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2011-01-23T12:17:13Z

uploaded a new version of "File:Bailey305.jpg"

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2011-01-23T12:16:36Z

{{Template:Bailey 1921 Figures}} Category:Human Category:Renal

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{{Template:Bailey 1921 Figures}}

[[Category:Human]] [[Category:Renal]]