Gastrointestinal Tract - Liver Development: Difference between revisions

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{{Template:Gastrointestinal Tract Links}} | [http://embryology.med.unsw.edu.au/Notes/git7.htm original page]
{{Template:Gastrointestinal Tract Links}} | [http://embryology.med.unsw.edu.au/Notes/git7.htm original page]
== Liver Development Stages ==
{| class="prettytable"
| <center>'''Carnegie Stage'''</center>
| '''Feature'''
|-
| <center>11</center>
| hepatic diverticulum development
|-
| <center>12</center>
| '''cell differentiation'''
septum transversum forming liver stroma
hepatic diverticulum forming hepatic trabeculae
|-
| <center>13</center>
| epithelial cord proliferation enmeshing stromal capillaries
|-
| <center>14</center>
| hepatic gland and its vascular channels enlarge
hematopoietic function appeared
|-
| <center>18</center>
| obturation due to epithelial proliferation
bile ducts became reorganized (continuity between liver cells and gut)
|-
| <center>18 to 23</center>
| biliary ductules developed in periportal connective tissue
produces ductal plates that receive biliary capillaries
<div align="right">(More? [../week/weekbyweekdetail.htm Development Week by Week - Detailed])</div>
|}
Data from Godlewski G, etal.<ref><pubmed>9407542</pubmed></ref> "Stage 11 was characterized by hepatic diverticulum development, stage 12 and thereafter by cellular differentiation (septum transversum giving the liver stroma and hepatic diverticulum the hepatic trabeculae), and stage 13 by epithelial cord proliferation enmeshing stromal capillaries. From stage 14, the hepatic gland and its vascular channels presented considerable enlargement while hematopoietic function appeared. From this stage, the development of cystic primordium, never present in rat, was constant in man. At stage 18, after a period of obturation due to epithelial proliferation, the bile ducts became reorganized and ensured the continuity between liver cells and gut. From stages 18 to 23, biliary ductules developed in periportal connective tissue producing ductal plates that received biliary capillaries."
See also Liver development in the rat during the embryonic period (Carnegie stages 15-23).<ref><pubmed>9718390</pubmed></ref>


==References==
==References==

Revision as of 14:27, 22 August 2010

Notice - Mark Hill
Currently this page is only a template and will be updated (this notice removed when completed).
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Introduction

This section of notes gives an overview of how the liver develops. The transverse septum (septum transversum) arises at an embryonic junctional site. The junctional region externally is where the ectoderm of the amnion meets the endoderm of the yolk sac. The junctional region internally is where the foregut meets the midgut. The mesenchymal structure of the transverse septum provides a support within which both blood vessels and the liver begin to form. This structure grows rapidly.

GIT Links: Introduction | Medicine Lecture | Science Lecture | endoderm | mouth | oesophagus | stomach | liver | gallbladder | Pancreas | intestine | mesentery | tongue | taste | enteric nervous system | Stage 13 | Stage 22 | gastrointestinal abnormalities | Movies | Postnatal | milk | tooth | salivary gland | BGD Lecture | BGD Practical | GIT Terms | Category:Gastrointestinal Tract
GIT Histology Links: Upper GIT | Salivary Gland | Smooth Muscle Histology | Liver | Gallbladder | Pancreas | Colon | Histology Stains | Histology | GIT Development
Historic Embryology - Gastrointestinal Tract  
1878 Alimentary Canal | 1882 The Organs of the Inner Germ-Layer The Alimentary Tube with its Appended Organs | 1884 Great omentum and transverse mesocolon | 1902 Meckel's diverticulum | 1902 The Organs of Digestion | 1903 Submaxillary Gland | 1906 Liver | 1907 Development of the Digestive System | 1907 Atlas | 1907 23 Somite Embryo | 1908 Liver | 1908 Liver and Vascular | 1910 Mucous membrane Oesophagus to Small Intestine | 1910 Large intestine and Vermiform process | 1911-13 Intestine and Peritoneum - Part 1 | Part 2 | Part 3 | Part 5 | Part 6 | 1912 Digestive Tract | 1912 Stomach | 1914 Digestive Tract | 1914 Intestines | 1914 Rectum | 1915 Pharynx | 1915 Intestinal Rotation | 1917 Entodermal Canal | 1918 Anatomy | 1921 Alimentary Tube | 1932 Gall Bladder | 1939 Alimentary Canal Looping | 1940 Duodenum anomalies | 2008 Liver | 2016 GIT Notes | Historic Disclaimer
Human Embryo: 1908 13-14 Somite Embryo | 1921 Liver Suspensory Ligament | 1926 22 Somite Embryo | 1907 23 Somite Embryo | 1937 25 Somite Embryo | 1914 27 Somite Embryo | 1914 Week 7 Embryo
Animal Development: 1913 Chicken | 1951 Frog

| original page

Liver Development Stages

Carnegie Stage
Feature
11
hepatic diverticulum development
12
cell differentiation

septum transversum forming liver stroma

hepatic diverticulum forming hepatic trabeculae

13
epithelial cord proliferation enmeshing stromal capillaries
14
hepatic gland and its vascular channels enlarge

hematopoietic function appeared

18
obturation due to epithelial proliferation

bile ducts became reorganized (continuity between liver cells and gut)

18 to 23
biliary ductules developed in periportal connective tissue

produces ductal plates that receive biliary capillaries

(More? [../week/weekbyweekdetail.htm Development Week by Week - Detailed])

Data from Godlewski G, etal.[1] "Stage 11 was characterized by hepatic diverticulum development, stage 12 and thereafter by cellular differentiation (septum transversum giving the liver stroma and hepatic diverticulum the hepatic trabeculae), and stage 13 by epithelial cord proliferation enmeshing stromal capillaries. From stage 14, the hepatic gland and its vascular channels presented considerable enlargement while hematopoietic function appeared. From this stage, the development of cystic primordium, never present in rat, was constant in man. At stage 18, after a period of obturation due to epithelial proliferation, the bile ducts became reorganized and ensured the continuity between liver cells and gut. From stages 18 to 23, biliary ductules developed in periportal connective tissue producing ductal plates that received biliary capillaries."

See also Liver development in the rat during the embryonic period (Carnegie stages 15-23).[2]

References

  1. <pubmed>9407542</pubmed>
  2. <pubmed>9718390</pubmed>


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Cite this page: Hill, M.A. (2024, March 29) Embryology Gastrointestinal Tract - Liver Development. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Gastrointestinal_Tract_-_Liver_Development

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