Vitelline duct: closure time
VItelline duct normally closes around week VI of intrauterine life.
Potter syndrome: features POTTER:
Twisted skin (wrinkly skin)
Twisted face (Potter facies)
Renal agenesis (bilateral)
Placenta-crossing substances "WANT My Hot Dog": Wastes
Cranial and spinal neural crest: major derivatives GAMES:
Glial cells (of peripheral ganglia)
Arachnoid (and pia)
Mesoderm components MESODERM:
Mesothelium (peritoneal, pleural, pericardial)/ Muscle (striated, smooth, cardiac)
Embryologic Spleen/ Soft tissue/ Serous linings/ Sarcoma/ Somite
Osseous tissue/ Outer layer of suprarenal gland (cortex)/ Ovaries
Dura/ Ducts of genitalia
Mesenchyme/ Male gonad
Vasculogenesis vs. angiogenesis
"Vascu is new. Angi is pre": Vasculogenesis is new vessels developing in situ from existing mesenchyme. Angiogenesis is vessels develop from sprouting off pre-existing arteries.
Weeks 2, 3, 4 of development: an event for each
Week Two: Bilaminar germ disc.
Week Three: Trilaminar germ disc.
Week Four: Four limbs appear.
Teratogenesis: when it occurs
TEratogenesis is most likely during organogenesis--between the: Third and Eighth weeks of gestation.
Tetrology of Fallot "Don't DROP the baby":
Right ventricular hypertrophy
Lung development phases "Every Premature Child Takes Air":
Terminal sac period
Branchial arch giving rise to aorta
"Aor- from Four": Aorta is from fourth arch.
Neuroectoderm gives rise to:
piNeurol (pineal) gland
Tetrology of Fallot
"IHOP-International House of Pancakes":
Interventricular septal defect
Hypotrophy of right ventricle
Woffian duct (mesonephric duct) derivatives.
· Female: Gartner's duct, cyst
"Little Embryo People Do Like Swallowing, Producing Gas": Lungs Esophagus Pancreas Duodenum (proximal) Liver Stomach Pancreas Gall bladder