learning objectives for body cavity development
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| show | Pericardial cavity (1); pleural cavities (2); and peritoneal cavity (1).
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| What two partitions must develop to form these cavities? | show 🗑
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| How is the pericardial cavity in free communication with the peritoneal cavity? | show 🗑
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| show | Two pleuropericardial membranes (sheets of somatic mesoderm) form the fibrous pericardium by growing inward from either lateral aspect of the embryo.
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| show | septum transversum, two pleuroperitoneal membranes and dorsal mesentery
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| What part does the septum transversum form? | show 🗑
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| show | largely responsible for the peripheral regions of the diaphragm, pleura and perioneum that cover its upper and lower surfaces respectively
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| What part does the dorsal mesentery of the esophagus forms ? | show 🗑
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| show | The septum transversum forms in the neck region by fusion of the third, forth and fifth cervical segments and is therefore innervated by spinal nerves from C3, 4, 5.
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| How do the pleural cavities form? | show 🗑
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| When does the respiratory system start to form? | show 🗑
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| show | a median longitudinal groove (laryngotracheal groove) develops in pharyngeal floor, edges of groove fuse and form a laryngotracheal tube whose lumen is separated from foregut.
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| What else occurs in respiratory formation? | show 🗑
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