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29 Cards in this Set
- Front
- Back
Which layers surround the intraembryonic cavity?
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Somatic and Splanchnic Mesoderm
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What gives rise to the visceral layer of serous membrane?
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Splanchnic Mesoderm
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What gives rise to the parietal layer of the serous membrane?
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Somatic Mesoderm
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The visceral and pariteal layers of serous membrane are continuous in three places:
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Heart (around origin of great vessels)
Lung (around root of the lung) Gut (dorsal mesentery) |
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Ventral Mesentery is derived from:
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Mesoderm of the septum transversum
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Dorsal mesentery extends from where to where?
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From the caudal part of esophagus to the end of the hindgut
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Ventral Mesentery Extends from where to where?
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Caudal aspect of the Esophagus to the upper portion of the duodenum.
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Plate of mesodermal tissue between the thoracic cavity and stalk of the yolk sac
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Septum Transversum
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Two spaces on either side of the foregut created by the expansion of septum transversum:
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Pericardioperitoneal Canal
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Ventral and lateral expansion of the lungs is posterior to what?
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Pleuropericardial Folds
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What structures become fibrous pericardium in the adult?
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Pleuropericardial membranes
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What do the pleuropericardial membranes fuse with?
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They fuse with each other and the root of the lungs
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What extends medially and ventrally from the dorsal body wall to close the pericardioperiotoneal canal?
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Pleuroperitoneal folds
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What two things do the pleuroperitoneal folds fuse with?
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The mesentery of the esophagus and septum transversum.
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What forms the muscular part of the diaphragm?
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Myoblasts from the body wall penetrate the membranes.
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What becomes the central tendon of the diaphragm?
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Septum Transversum
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What forms the crua of the diaphragm?
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Mesentery of the esophagus
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Most of the periphery of the diaphragm is from:
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The mesenchyme of the thoracic wall
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3 types of intraembryonic mesoderm:
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Paraxial, intermediate, and Lateral Plate
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Intercellular clefts appear where?
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Lateral Plate Mesoderm
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Communicating conduit between the yolk sac and the gut
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Omphaloenteric Duct
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Lung buds grow in which direction?
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Caudolaterally
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Mesoderm of the body wall gives rise to (2 things)
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Definitive wall of the thorax and pleuropericardial membranes
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Septum Transversum Migration
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4th week- cervical
6th week-Thoracic 3rd motnth- L 1 |
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Septum Transversum comes from
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Mesoderm
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Central Tendon of the Diaphragm comes from:
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Septum Transversum
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Small central portion of the diaphragm comes from:
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pleuroperiotoneal membranes
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Crua of the diaphragm comes from
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Esophagus mesentery myoblasts
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Muscular portion of the diaphragm comes from:
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Body wall myoblasts
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