Coelomic Cavity Development: Difference between revisions

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Introduction

There are cavities, coeloms, that form and lie both outside the embryo (extraembryonic) and inside the embryo (intraembryonic) during development.

The intraembryonic coelom is the primitive cavity that lies within the developing embryo that will form the 3 major body cavities: pericardial, pleural, peritoneal. The coelom forms very early in embryogenesis and is much later paritioned inferiorly by the diaphragm and pleuroperitoneal membrane; and superiorly initially by the pleuropericardial fold between the heart and lungs. The intraembryonic coelom communicated through coelomic portals (at the level of midgut herniation) with the extraembryonic coelom.

All cavities are fluid filled and developing organs push against a wall of the cavity, generating a double coat (serosal/adventital) surrounding an organ (for example the lungs). The serous membrane is the epithelium (squamous) and its associated underlying loose connective tissue.

Coelom Links: Introduction | Lecture - Week 3 Development | Lecture - Mesoderm Development | Placenta - Membranes | Category:Coelomic Cavity

Historic Embryology - Coelomic Cavity
1891 peritoneal \| 1897 human coelom \| 1910 Coelom and Diaphragm \| 1924 serous

| original page

Objectives

Describe the development of the intra- and extra-embryonic coeloms.
Describe the processes involved in the development of the three divisions of the intra-embryonic coelom; pericardium, pleural cavities and peritoneum.
Describe the fate of the extra embryonic coelom.
Describe the development of the diaphragm.

Development Overview

Extraembryonic Coelom cavity surrounding the developing embryo	coelomic portalstransient communication between extra/intracoelom	Intraembryonic Coelom horseshoe shaped structure forms 3 main cavities	Neural Tube
percardial cavity	Ventricular space
L/R pleural cavities	Spinal canal
peritoneal cavity	(More? Neural System Development)

Intraembryonic Coelom

Percardial Cavity

Pleural Cavity

Peritoneal Cavity

Terms

atresia- obstruction.
eppiglottis- develops from hypobrachial eminence.
fistula- abnormal comunication.
hypopharyngeal eminence- fusion of 3rd pharyngeal arches, precursor of root of tongue.
laryngotracheal groove- forms on anterior (ventral) wall of pharynx, gives rise to larynx, trachea, respiratory tree.
larynx- lining from endoderm, cartilage from pharyngeal arch 4 and 6.
lung buds- primordia of lungs.
parietal pleura-outer lining of pleural cavity derived from epithelia of pericardioperitoneal canals from intraembryonic coelom.
pleural cavity- walls derived from pericardioperitoneal canals -> intraembryonic coelom ->coelomic spaces -> lateral mesoderm -> mesoderm.
pleuropericardial fold- restricts the communication between pleural cavity and pericardiac cavity, contains cardinal vein and phrenic nerve.
pleuroperitoneal membrane- forms inferiorly at transverse septum to separate peritoneum from pleural cavity.
septum transversum- mesoderm separating thoracic cavity and yolk sac, forms central tendon of diaphragm (and some of liver?).
stenosis- narrowing
surfactant- a detergent secreted by Type 2 alveolar cells between alveolar epithelium. Functions to lower surface tension, allowing lungs to remain inflated.
visceral pleura- inner lining of pleural cavity derived from contact epithelia with lung bud of pericardioperitoneal canals from intraembryonic coelom.

Mesothelia

The epithelial covering of coelomic organs and also line their cavities.

Contribute to the vasculature of the heart and the intestinal tract. Undergo epithelial-mesenchymal transition (EMT), migration, and differentiation into endothelial cells, vascular smooth muscle cells, and pericytes.

References

Reviews

Articles

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Search Pubmed: Coelomic Cavity Development | peritoneal cavity development

Glossary Links

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Cite this page: Hill, M.A. (2024, April 16) Embryology Coelomic Cavity Development. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Coelomic_Cavity_Development

What Links Here?

@@ Line 1: / Line 1: @@
 ==Introduction==
-There are cavities, coeloms, that form and lie both outside the embryo (extraembryonic) and inside the embryo (intraembryonic) during development.
+There are cavities, coeloms, that form and lie both outside the embryo (extraembryonic) and inside the embryo ([[I#intraembryonic coelom|intraembryonic]]) during development.
-The intraembryonic coelom is the primitive cavity that lies within the developing embryo that will form the 3 major body cavities: pericardial, pleural, peritoneal. The coelom forms very early in embryogenesis and is much later paritioned inferiorly by the diaphragm and pleuroperitoneal membrane; and superiorly initially by the pleuropericardial fold between the heart and lungs. The intraembryonic coelom communicated through coelomic portals (at the level of midgut herniation) with the extraembryonic coelom.
+The [[I#intraembryonic coelom|intraembryonic coelom]] is the primitive cavity that lies within the developing embryo that will form the 3 major body cavities: [[P#pericardial cavity|pericardial]], [[P#pleural cavity|pleural]], [[P#peritoneal cavity|peritoneal]]. The coelom forms very early in embryogenesis and is much later paritioned inferiorly by the [[D#diaphragm|diaphragm]] and pleuroperitoneal membrane; and superiorly initially by the [[P#pleuropericardial fold|pleuropericardial fold]] between the heart and lungs. The intraembryonic coelom communicated through [[C#coelomic portal|coelomic portals]] (at the level of midgut herniation) with the extraembryonic coelom.
 All cavities are fluid filled and developing organs push against a wall of the cavity, generating a double coat (serosal/adventital) surrounding an organ (for example the lungs). The serous membrane is the epithelium (squamous) and its associated underlying loose connective tissue.