pleuropericardial folds

pleuropericardial folds: a pair of small ridges that originate along the lateral body walls in the fifth week of embryonic development and project into the cranial ends of the pericardioperitoneal canals to divide the pleural cavities from the pericardial cavity; they later develop into the pleuropericardial membranes.

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pleuropericardial membranes — a pair of partitions in the embryo that separate the pericardial cavity from the pleural cavities; formed by enlargement of the pleuropericardial folds and containing the common cardinal veins and phrenic nerves … Medical dictionary
Lateral plate mesoderm — Infobox Embryology Name = PAGENAME Latin = GraySubject = 6 GrayPage = 50 Caption = Transverse section of a chick embryo of forty five hours’ incubation. * Chordamesoderm: yellow, at notochord. * Paraxial mesoderm: red, at somite. * Intermediate… … Wikipedia
ridge — 1. A (usually rough) linear elevation. SEE ALSO: crest. 2. In dentistry, any linear elevation on the surface of a tooth. 3. The remainder of the alveolar process and its soft … Medical dictionary
fold — 1. A ridge or margin apparently formed by the doubling back of a lamina. SYN: plica. 2. In the embryo, a transient elevation or reduplication of tissue in the form of a lamina … Medical dictionary
Thoracic diaphragm — diaphragm Respiratory system Latin diaphragma Artery Pericardiacophrenic artery … Wikipedia

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