Embryology Mnemonics

Vitelline duct: closure time
VItelline duct normally closes around week VI of intrauterine life.

Potter syndrome: features POTTER:
Pulmonary hypoplasia
Oligohydrominios
Twisted skin (wrinkly skin)
Twisted face (Potter facies)
Extremities defects
Renal agenesis (bilateral)

Placenta-crossing substances "WANT My Hot Dog": Wastes
Antibodies
Nutrients
Teratogens
Microorganisms
Hormones/ HIV
Drugs

Cranial and spinal neural crest: major derivatives GAMES:
Glial cells (of peripheral ganglia)
Arachnoid (and pia)
Melanocytes
Enteric ganglia
Schwann cells

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
Endothelium
Renal Microglia
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":
Defect (VSD)
Right ventricular hypertrophy
Overriding aorta
Pulmonary stenosis

Lung development phases "Every Premature Child Takes Air":
Embryonic period
Pseudoglandular period
Canalicular peroid
Terminal sac period
Alveolar period

Branchial arch giving rise to aorta
"Aor- from Four": Aorta is from fourth arch.

Neuroectoderm derivatives
Neuroectoderm gives rise to:
Neurons
Neuroglia
Neurohypophysis
piNeurol (pineal) gland

Tetrology of Fallot
"IHOP-International House of Pancakes":
Interventricular septal defect
Hypotrophy of right ventricle
Overriding aorta
Pulmonary stenosis

Woffian duct (mesonephric duct) derivatives.
Gardener's SEED:
• Female: Gartner's duct, cyst
• Male:
Seminal vesicles
Epididymis
Ejaculatory duct
Ductus deferens

Foregut derivatives
"Little Embryo People Do Like Swallowing, Producing Gas": Lungs Esophagus Pancreas Duodenum (proximal) Liver Stomach Pancreas Gall bladder