Folding and organogenesis Flashcards
Head to tail folding due to growth of ___
due to growth of forebrain
Lateral folding due ot growth of____
due to growth of amniotic cavity (mainly) and to a lesser degree growth of somites
Intraembryonic coelom develops into…
peritoneal cavity
pericardial cavity
2 pericardioperitoneal canals
Communication between intraembryonic coelom and extraembryonic coelom allows for…
herniation of the midgut during development
pleuropericardial folds separate…
the heart and lungs.
contain common cardinal veins and phrenic n.
form the fibrous pericardium in the adult
4 embryologic components of the diaphragm
- septum transversum –> central tendon
- pleuroperitoneal membranes
- dorsal mesentery of esophagus
- muscular ingrowth from lateral body walls
where does the septum transversum initially form?
from mesoderm ahead of the orapharyngeal membrane
what is the innervation to the diaphragm?
phrenic n. C3, 4, 5, keep the diaphragm alive!
congenital diaphragmatic hernia
more common on left side (right closes first)
intestines herniate into pleural cavity, not allowing lungs enough space to develop
CNS, PNS, epidermis, hair, nails, mammary glands, pituitary gland, subcutaneous glands, neural crest cells, spinal, cranial, autonomic ganglia and nerves are some impt examples derived from…
the ectoderm
membranes of body cavities, blood, lymph cells, cardiovascular and lymphatic systems, skull
lateral mesoderm
urogenital system; kidneys and gonads from
intermediate mesoderm
muscles of trunk, skeleton except skull, dermis, connective tissue from
paraxial mesoderm
epithelial parts of trachea, bronchi, lungs, epithelium of GI tract, liver, pancreas, urinary bladder, urachus, pharynx, thyroid from
endoderm
