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16 Cards in this Set
- Front
- Back
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What is the embryonic cavity that is divided into 4 cavities within the thorax?
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Coelom
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Name the 4 cavities that make up the coelom.
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pericardial, pleural (2), peritoneal
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Between which two layers does the initial coelomic cavity form?
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between the splanchnic and somatic layers of the LPM
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During body folding, when the L and R sides fuse together, what is left where they pinch?
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dorsal mesentery
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What forms from the LPM layers?
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serous membranes, specifically parietal (somatic) and visceral (splanchnic)
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What is the coelomic cavity in front of the developing brain called?
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pericardial coelom
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What is the mesoderm cranial to the paricardial coelom called?
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septum transversum
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How does the pericardial coelom/septum transversum move with body folding?
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Folds ventrally so that is lies caudally to the head fold; septum transversum now caudal to pericardail coelom
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After body folding, what lies between the primitive pericardial cavity and the peritoneal cavity?
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septum transversum and pericardioperitoneal cavity
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What does the visceral pleura initially cover?
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the lung buds and their derivatives (internal cover)
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What does the parietal pleura initially cover?
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Outside of pericardioperitoneal canals
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What grows to separate the pericardial cavity from the pericardioperitoneal cavity? What germ layer does this arise from?
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the Pleuropericardial folds bulge in, which comes from the somatic LPM and contains phrenic nerves
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What forms when the pleuropericardial folds fuse together?
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fibrous pericardium
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What four structures contribute to the diaphragm?
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Septum transversum, mesentery of esophagus, pleuroperitoneal membranes, and myoblasts from body wall and C3-C5 somites
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What causes Congenital diaphragmatic hernia?
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Failure of pleuroperitoneal folds to close (on left side)
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During which week does the pericardial cavity separate?
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weeks 5-6
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