Embryology Mnemonics

embImage: blog.cranioschool.com

Mitosis: events at 4 stages · Prophase, Metaphase, Anaphase,
Telophase:
Prophase: Chromosomes and spindles are Produced.
Metaphase: chromosomes MetAlign themselves.
Anaphase: [Ana] divorced or separated.
Telophase: Tell-O’Brien his daughter cells are ready.

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

Potter syndrome: features POTTER:

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

Fetal alcohol syndrome (FAS): features FAS:
Facial hypoplasia/ Forebrain malformation
Attention defecit disorder/ Altered joints
Short stature/ Septal defects/ Small I.Q

Tetrology of Fallot PROVe:
Pulmonary stenosis
Right ventricular hypertrophy
Overriding aorta
Ventricular septal defect

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

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

Heart: primitive heart chambers in fetal heart “The
Broken Vein Always Stenoses, But Veins
Are Smooth”:
· The order of the compartments is:
<b<t< b>runcus, bulbus
Primitive Ventricle
Primitive Atrium
Sinus venosus
·The connections are:
Bulbotruncal junctionVentriculobulbar foramen
Atrioventricular canal
Sinuatrial junction

Tetrology of Fallot “Problems Of Small
Hearts”:
Pulmonary stenosis
Overriding aorta
Ventricular Septal defect
Hypertrophy of right ventricle

Weeks 2, 3, 4 of development: an event for each Week Two:
Bilaminar germ disc.
Week Three: Trilaminar germ disc.
Week Four: Fourlimbs appear.

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.

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

Tetrology of Fallot “Don’t DROP the baby”:
Defect (VSD)
Right ventricular hypertrophy
Overriding aorta
Pulmonary stenosis

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

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

Teratogenesis: when it occurs TEratogenesis is most
likely during organogenesis–between the:
Third and
Eighth weeks of gestation.

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



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