2009 Lab 4 - Revision history

Z3267024: /* Introduction */

2010-08-18T04:10:16Z

Introduction

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	== Introduction ==		== Introduction ==

	~~[[Image:Embryonic Circulations.jpg\|thumb\|left\|Three components of early circulation]]~~

	The vascular system of the embryo is formed from blood islands that appear in the extraembryonic mesoderm of the yolk sac and the embryonic mesoderm (primarily splanchnic mesoderm). Both of these clusters fuse together and extend, forming a vast network.		The vascular system of the embryo is formed from blood islands that appear in the extraembryonic mesoderm of the yolk sac and the embryonic mesoderm (primarily splanchnic mesoderm). Both of these clusters fuse together and extend, forming a vast network.

Z3267024: /* Introduction */

2010-08-17T02:39:37Z

Introduction

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	== Introduction ==		== Introduction ==

	[[Image:Embryonic Circulations.jpg\|thumb\|]]		[[Image:Embryonic Circulations.jpg\|thumb\|left\|Three components of early circulation]]

	The vascular system of the embryo is formed from blood islands that appear in the extraembryonic mesoderm of the yolk sac and the embryonic mesoderm (primarily splanchnic mesoderm). Both of these clusters fuse together and extend, forming a vast network.		The vascular system of the embryo is formed from blood islands that appear in the extraembryonic mesoderm of the yolk sac and the embryonic mesoderm (primarily splanchnic mesoderm). Both of these clusters fuse together and extend, forming a vast network.

Z3267024: /* Introduction */

2010-08-17T02:37:42Z

Introduction

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	== Introduction ==		== Introduction ==

	[[Image:Embryonic Circulations.jpg]]		[[Image:Embryonic Circulations.jpg\|thumb\|]]

	The vascular system of the embryo is formed from blood islands that appear in the extraembryonic mesoderm of the yolk sac and the embryonic mesoderm (primarily splanchnic mesoderm). Both of these clusters fuse together and extend, forming a vast network.		The vascular system of the embryo is formed from blood islands that appear in the extraembryonic mesoderm of the yolk sac and the embryonic mesoderm (primarily splanchnic mesoderm). Both of these clusters fuse together and extend, forming a vast network.

Z3267024: /* Introduction */

2010-08-17T02:36:43Z

Introduction

← Older revision		Revision as of 12:36, 17 August 2010
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	== Introduction ==		== Introduction ==

	[[Image:~~HeartILP draft embryoniccirc~~.jpg]]		[[Image:Embryonic Circulations.jpg]]

	The vascular system of the embryo is formed from blood islands that appear in the extraembryonic mesoderm of the yolk sac and the embryonic mesoderm (primarily splanchnic mesoderm). Both of these clusters fuse together and extend, forming a vast network.		The vascular system of the embryo is formed from blood islands that appear in the extraembryonic mesoderm of the yolk sac and the embryonic mesoderm (primarily splanchnic mesoderm). Both of these clusters fuse together and extend, forming a vast network.

Z3267024: /* Introduction */

2010-08-17T02:36:08Z

Introduction

← Older revision		Revision as of 12:36, 17 August 2010
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	== Introduction ==		== Introduction ==

			[[Image:HeartILP draft embryoniccirc.jpg]]

	The vascular system of the embryo is formed from blood islands that appear in the extraembryonic mesoderm of the yolk sac and the embryonic mesoderm (primarily splanchnic mesoderm). Both of these clusters fuse together and extend, forming a vast network.		The vascular system of the embryo is formed from blood islands that appear in the extraembryonic mesoderm of the yolk sac and the embryonic mesoderm (primarily splanchnic mesoderm). Both of these clusters fuse together and extend, forming a vast network.

S8600021 at 23:34, 1 September 2009

2009-09-01T23:34:56Z

← Older revision		Revision as of 09:34, 2 September 2009
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	'''Embryo Images Unit:''' [http://www.med.unc.edu/embryo_images/ Embryo Images Online] Early Cell Populations (cardiogenic section) \| [http://www.med.unc.edu/embryo_images/unit-cardev/cardev_htms/cardevtoc.htm Cardiovascular Development] \| [http://www.med.unc.edu/embryo_images/unit-cardev/cardev_htms/cardev001.htm Week 3 Development] \| [http://www.med.unc.edu/embryo_images/unit-cardev/cardev_htms/cardev007.htmhttp://www.med.unc.edu/embryo_images/unit-cardev/cardev_htms/cardev007.htm Week 4 Development] \| [http://www.med.unc.edu/embryo_images/unit-cardev/cardev_htms/cardev018.htm Heart Chambers and Outflow Tract] \| [http://www.med.unc.edu/embryo_images/unit-cardev/cardev_htms/cardev022.htm Atrioventricular Septation] \| [http://www.med.unc.edu/embryo_images/unit-cardev/cardev_htms/cardev028.htm Outflow Tract Septation] \| [http://www.med.unc.edu/embryo_images/unit-cardev/cardev_htms/cardev035.htm Ventricular Septation] \| [http://www.med.unc.edu/embryo_images/unit-cardev/cardev_htms/cardev036.htm Atrial Septation] \| [http://www.med.unc.edu/embryo_images/unit-cardev/cardev_htms/cardev040.htm Atrial Walls] [http://www.med.unc.edu/embryo_images/unit-cardev/cardev_htms/cardev041.htm Aortic Arch Vessels] \| [http://www.med.unc.edu/embryo_images/unit-cardev/cardev_htms/cardev042.htm Changes at Birth]		'''Embryo Images Unit:''' [http://www.med.unc.edu/embryo_images/ Embryo Images Online] Early Cell Populations (cardiogenic section) \| [http://www.med.unc.edu/embryo_images/unit-cardev/cardev_htms/cardevtoc.htm Cardiovascular Development] \| [http://www.med.unc.edu/embryo_images/unit-cardev/cardev_htms/cardev001.htm Week 3 Development] \| [http://www.med.unc.edu/embryo_images/unit-cardev/cardev_htms/cardev007.htmhttp://www.med.unc.edu/embryo_images/unit-cardev/cardev_htms/cardev007.htm Week 4 Development] \| [http://www.med.unc.edu/embryo_images/unit-cardev/cardev_htms/cardev018.htm Heart Chambers and Outflow Tract] \| [http://www.med.unc.edu/embryo_images/unit-cardev/cardev_htms/cardev022.htm Atrioventricular Septation] \| [http://www.med.unc.edu/embryo_images/unit-cardev/cardev_htms/cardev028.htm Outflow Tract Septation] \| [http://www.med.unc.edu/embryo_images/unit-cardev/cardev_htms/cardev035.htm Ventricular Septation] \| [http://www.med.unc.edu/embryo_images/unit-cardev/cardev_htms/cardev036.htm Atrial Septation] \| [http://www.med.unc.edu/embryo_images/unit-cardev/cardev_htms/cardev040.htm Atrial Walls] [http://www.med.unc.edu/embryo_images/unit-cardev/cardev_htms/cardev041.htm Aortic Arch Vessels] \| [http://www.med.unc.edu/embryo_images/unit-cardev/cardev_htms/cardev042.htm Changes at Birth]

	{{Template:~~Glossary\|Template:Glossary}}~~		{{Template:2009ANAT2341}}

	~~== Next Lecture ==~~
	~~[[2009 Lecture 9\|Lecture 9]] \| [[ANAT2341_Embryology_2009#Course_Timetable\|Course Timetable]]~~
	~~{{Template:Footer\|Template:Footer~~}}

	[[Category:2009ANAT2341]]		[[Category:2009ANAT2341]]

MarkHill: /* Introduction */

2009-08-20T02:31:42Z

Introduction

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	The early circulation has 3 components: Vitelline, Embryonic, Placental Each of these has its own system of arteries and veins.		The early circulation has 3 components: Vitelline, Embryonic, Placental Each of these has its own system of arteries and veins.

	'''Vitelline''' - (not shown) the vitelline arteries branch off the dorsal aortas and enter the yolk sac, covering its entire surface. The vitelline veins return red blood cells from the capillary beds to the sinus venosus, posterior to the heart. The vitelline vessels eventually contribute to the portal system of the liver in the adult.		* '''Vitelline''' - (not shown) the vitelline arteries branch off the dorsal aortas and enter the yolk sac, covering its entire surface. The vitelline veins return red blood cells from the capillary beds to the sinus venosus, posterior to the heart. The vitelline vessels eventually contribute to the portal system of the liver in the adult.

	'''Embryonic''' - blood from the dorsal aorta enters intersegmental arteries, including the arteries of the pharyngeal arches. The blood returns to the heart via the anterior and posterior cardinal veins.		* '''Embryonic''' - blood from the dorsal aorta enters intersegmental arteries, including the arteries of the pharyngeal arches. The blood returns to the heart via the anterior and posterior cardinal veins.

	'''Placental''' - the umbilical arteries receive blood from the aorta. This is carried to the chorionic villi, where exchange occurs with the mother. Waste products are disposed of, nutrients and oxygen are collected, and then the umbilical veins convey the blood to the sinus venosus.		* '''Placental''' - the umbilical arteries receive blood from the aorta. This is carried to the chorionic villi, where exchange occurs with the mother. Waste products are disposed of, nutrients and oxygen are collected, and then the umbilical veins convey the blood to the sinus venosus.

	'''Heart''' - The heart develops from cardiogenic mesoderm, a region of splanchnic mesoderm lying above the buccopharyngeal membrane. Development begins in week 3 with the formation of a pair of heart tubes. These fuse and form a single tube in week 4, as a result of the embryonic folding processes that occur. As the heart grows, septation events occur, transforming it into a 4-chambered pump. Initially, the ventricles develop above the atria; however simultaneous growth and bending of the tube bring the structures into correct position. In humans, the heart begins to beat on day 22-23.		'''Heart''' - The heart develops from cardiogenic mesoderm, a region of splanchnic mesoderm lying above the buccopharyngeal membrane. Development begins in week 3 with the formation of a pair of heart tubes. These fuse and form a single tube in week 4, as a result of the embryonic folding processes that occur. As the heart grows, septation events occur, transforming it into a 4-chambered pump. Initially, the ventricles develop above the atria; however simultaneous growth and bending of the tube bring the structures into correct position. In humans, the heart begins to beat on day 22-23.

	==Objectives==		==Objectives==

S8600021: /* Stage 14 Embryo */

2009-08-19T22:33:51Z

Stage 14 Embryo

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	\|}		\|}

			Compare this mid-embryonic cardiovascular system with that existing at the end of embryonic development [http://embryology.med.unsw.edu.au/Movies/CVS3dmodelst22.htm Stage 22 3D CVS reconstruction]

	== Group projects ==		== Group projects ==

S8600021: /* Next Lecture */

2009-08-19T13:47:31Z

Next Lecture

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	{{Template:Footer\|Template:Footer}}		{{Template:Footer\|Template:Footer}}

	[[Category:2009ANAT2341]] [[Category:Science-Undergraduate]] [[Category:Heart]]		[[Category:2009ANAT2341]]
			[[Category:Science-Undergraduate]]
			[[Category:Heart]]
			[[Category:Cardiovascular]]

S8600021: /* Next Lecture */

2009-08-19T13:46:15Z

Next Lecture

← Older revision		Revision as of 23:46, 19 August 2009
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	[[Category:2009ANAT2341]][[Category:Science-Undergraduate]]		[[Category:2009ANAT2341]] [[Category:Science-Undergraduate]] [[Category:Heart]]