Z8600021: /* Separation at Birth and Restoration of the Mucous Mem"brane of the Uterus */

2012-10-11T23:34:48Z

Separation at Birth and Restoration of the Mucous Mem"brane of the Uterus

← Older revision		Revision as of 10:34, 12 October 2012
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	The continuity of the decidua vera and decidua reflexa with the decidua serotina, and of all three with the whole thickness of the placenta at its margin, sufficiently demonstrates the actual coonection of the maternal elements in these several structures, and the existence of that connection is fully confirmed by tracing the steps of the primary formation and subsequent development of the two sets of placental elements, by which are ascertained the actual presence of both in the commencement, and the gradual modification and disappearance of the maternal part. The view thus arrived at receives further support from the result of the observation of the varieties of form and structure presented by the placental organisation in different animals.		The continuity of the decidua vera and decidua reflexa with the decidua serotina, and of all three with the whole thickness of the placenta at its margin, sufficiently demonstrates the actual coonection of the maternal elements in these several structures, and the existence of that connection is fully confirmed by tracing the steps of the primary formation and subsequent development of the two sets of placental elements, by which are ascertained the actual presence of both in the commencement, and the gradual modification and disappearance of the maternal part. The view thus arrived at receives further support from the result of the observation of the varieties of form and structure presented by the placental organisation in different animals.

	===Separation at Birth and Restoration of the Mucous ~~Mem"brane~~ of the Uterus===		==Separation at Birth and Restoration of the Mucous Membrane of the Uterus==

	In the act of birth the whole decidual structures which have been formed in human uterogestation are separated from the uterus along with all those belonging to the ovum, and the placentation is thus said to be completely deciduate. Thus in parturition, fi'om the effect of the contraction of the uterine walls and the abdominal muscles, after the usual rupture of the foetal membranes and the discharge of the amniotic fluid, the foetus is first expelled : the placenta is next detached and pressed downwards, carrying with it the layer of serotina by which it is covered on its uterine surface, and along with it necessarily are broken through the coiled arteries and the slanting veins ; the membranes of the ovum follow, consisting of the amnion and chorion, together with the shrunken covering of decidua which in the last stage of pregnancy remains from the union of decidua reflexa with decidua vera matted together into one, which is finally peeled off the whole of the interior of the uterus.		In the act of birth the whole decidual structures which have been formed in human uterogestation are separated from the uterus along with all those belonging to the ovum, and the placentation is thus said to be completely deciduate. Thus in parturition, fi'om the effect of the contraction of the uterine walls and the abdominal muscles, after the usual rupture of the foetal membranes and the discharge of the amniotic fluid, the foetus is first expelled : the placenta is next detached and pressed downwards, carrying with it the layer of serotina by which it is covered on its uterine surface, and along with it necessarily are broken through the coiled arteries and the slanting veins ; the membranes of the ovum follow, consisting of the amnion and chorion, together with the shrunken covering of decidua which in the last stage of pregnancy remains from the union of decidua reflexa with decidua vera matted together into one, which is finally peeled off the whole of the interior of the uterus.

Z8600021: /* Uterogestation - Placentation */

2012-10-11T22:29:18Z

Uterogestation - Placentation

← Older revision		Revision as of 09:29, 12 October 2012
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	=Uterogestation - Placentation=		=Uterogestation - Placentation=
			: '''Extra-Embryonic Phenomena of Development'''


	{{Quain header}}		{{Quain header}}

Z8600021 at 22:21, 11 October 2012

2012-10-11T22:21:58Z

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Z8600021: Created page with " UTEROGESTATION : PLACENTATION. ===Incapsulation of the Ovum in the Becidua=== The further history of the chorion may be best given along with that of the structures by whic..."

2012-10-11T08:25:22Z

Created page with " UTEROGESTATION : PLACENTATION. ===Incapsulation of the Ovum in the Becidua=== The further history of the chorion may be best given along with that of the structures by whic..."

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Book - Quain's Embryology 4 - Revision history

Z8600021: /* Separation at Birth and Restoration of the Mucous Mem"brane of the Uterus */

Z8600021: /* Uterogestation - Placentation */

Z8600021 at 22:21, 11 October 2012

Z8600021: Created page with " UTEROGESTATION : PLACENTATION. ===Incapsulation of the Ovum in the Becidua=== The further history of the chorion may be best given along with that of the structures by whic..."