Thorax: Embrology, Non-Cardiac Flashcards
1. recall the formation of the intraembryonic coelom from lateral and longitudinal folding of the embryo 2. describe the effect of embryonic folding on the placement of the developing heart and septum transversum 3. describe the division of the intraembryonic coelom into the pericardial, pleural, and peritoneal cavities 4. describe the formation of the diaphragm 5. describe the contributions of endoderm and mesoderm to the adult structures of the lung 6. explain some common congen
costodiaphragmatic recess
- arises- from paraxial mesoderm> somites> myotomes> muscles of anterolateral trunk
innervation, diaphragm (explain embryologically)
- central: C3-5, location of central ligament
2. costal rim: innervated by lower intercostal nerves (origin is from the lateral body wall)
Diaphragm: what is the embryonic primordium that gives rise to the adult central tendon?
septum transversum
Diaphragm: what is the embryonic primordium that gives rise to the adult muscular crura?
dorsal mesentry of esophagus
Diaphragm: what is the embryonic primordium that gives rise to the adult outer rim of diaphragm?
body wall
Diaphragm: what is the embryonic primordium that gives rise to the adult diaphragmatic musculature?
cervical somites
Diaphragm: what is the embryonic primordium that gives rise to only a small portion of the diaphragm?
pleuroperitoneal membrane
what structure separates the foregut and respiratory diverticulum during week 4?
the tracheoesophagel ridge< foregut< endoderm
what is the tracheoesophagel ridge?
a structure that separates the foregut and respiratory diverticulum during week 4
visceral pleura & stroma of trachea, bronchi, & lungs (smooth muscle, blood vessels, cartilage)
lateral plate mesoderm, visceral layer
cervical somites C3-C5
give rise to most of the central diaphragmatic musculature
fate map: intraembryonic coelom
vesciles lateral plate> intraembryonic coelom> pericardial cavity + peridicardoperitoneal canals
what two structures fuse to separate the thorax from the abdomen?
pleuroperitoneal membrane and septum transversum
fate map: parenchyma of lungs
endoderm> foregut> lung buds> parenchyma of lungs
pleuropericardial membranes
parietal layer of lateral plate mesoderm>
peuropericardial membrane>
fibrous pericardium