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65 Cards in this Set

  • Front
  • Back
Fetal Landmark: Primitive Streak
Week 3
Fetal Landmark: Notochord
Week 3
Heart begins to beat
Week 4
Upper and lower limb bud formation?
Week 4
Genitalia have male/female characteristics
Week 10
Adenohypophysis, lens of eye, epithelial linings, epidermis.
Surface ectoderm.
Neurohypophysis, CNS neurons, oligodendrocytes, astrocytes.
Neuroectoderm.
Ependymal cells, Pineal gland.
Neuroectoderm.
ANS, dorsal root ganglia, cranial nerves.
Neural crest.
Melanocytes, chromaffin cells of adrenal medulla, parafollicular (C) cells of thyroid.
Neural crest.
Laryngeal cartilage, bones of skull.
Neural crest.
Dura mater, connective tissue.
Mesoderm.
Muscle, bone, cardiovascular structures, lymphatics, blood.
Mesoderm.
Urogenital structures, serous linings of body cavities (peritoneal), spleen.
Mesoderm.
Adrenal cortex, Kidneys.
Mesoderm.
Gut tube epithelium and derivatves.
Endoderm.
Lungs, liver, pancreas.
Endoderm.
Thymus, parathyroid, thyroid follicular cells.
Endoderm.
Nucleus pulposus of intervertebral disk.
Notochord.
Most susceptible period of pregnancy?
3rd-8th weeks (organogenesis).
Truncus arteriosus
Ascending aorta and pulmonary trunk.
Bulbus cordis.
Smooth parts of left and right ventricle.
Primitive ventricle.
Trabeculated parts of left and right ventricle.
Primitive atria.
Trabeculated left and right atrium.
Left horn of sinus venosus
Coronary Sinus.
Right horn of sinus venosus.
Smooth part of right atrium.
Right common cardinal vein and right anterior cardinal vein.
SVC.
Chorion consists of?
Extraembryonic somatic mesoderm, cytotrophoblast, syncytiotrophoblast.
Closes PDA, keeps patent PDA open?
Indomethacin, Prostaglandins.
Ligamentum teres hepatis?
Umbilical vein.
Medial umbilical ligaments
Umbilical arteries.
Median umbilical ligament.
Allantois/Urachus.
Aortic arch- #1
Maxillary artery.
Aortic arch- #2
Stapedial artery and hyoid artery.
Aortic arch- #3
Common carotid artery and proximal part of internal carotid artery.
Aortic arch #4.
Aortic arch on left, proximal part of right subclavian artery.
Aortic arch #6.
Proximal part of pulmonary arteries and ductus arteriosus.
Branchial clefts derived from?
Ectoderm.
Branchial arches derived from?
Mesoderm.
Branchial pouches derived from?
Endoderm.
Muscles of mastication, mandible, maxilla, malleus.
Branchial arch 1 derivatives.
Stapes, Styloid process. Stapedius, Stylohyloid.
Branchial arch 2 derivatives.
Stylopharyngeus.
Branchial arch 3 derivatives.
Most pharyngeal constrictors, cricothyroid, levator veli palatini.
Branchial arch 4.
All intrinsic muscles of larynx, except cricothyroid.
Branchial arch 6.

(Branchial arch 5 makes no major developmental contribution).
Branchial arch innervation:
1
2
3
4
6
CN V
CN VII
CN IX
CN X- superior laryngeal branch.
CN X- recurrent laryngeal branch.
Anterior 2/3 of tongue?
Formed by branchial arch 1. Sensation via CN V3, taste via CN VII.
Posterior 1/3 of tongue?
3rd and 4th arches.
Sensation and taste mainly CN IX.
Extreme posterior CN X.
Motor innervation of tongue?
CN XII.
1st branchial cleft?

2nd-4th clefts?
External auditory meatus.

obliterated. if they proliferate lead to branchial cyst in the neck.
1st branchial pouch?
Middle ear cavity, eustachian tube, mastoid air cells.

1st pouch contributes to endoderm-lined structures of ear.
2nd branchial pouch?
Epithelial lining of palatine tonsil.
3rd branchial pouch?
Inferior parathyroids and thymus.
4th branchial pouch?
Superior parathyroids.
Aberrant development of 3rd and 4th pouches?
DiGeorge's syndrome. leads to T cell deficiency and hypocalcemia.
Cleft lip?
Failure of fusion of maxillary and medial nasal processes.
Cleft palate?
Failure of fusion of lateral palatine processes, the nasal septum, and/or the median palatine process.
Diaphragm derived from?
Septum transversum, pleuroperitoneal folds, body wall, dorsal mesentery of esophagus.
Spleen comes from?
Dorsal mesentery but supplied by artery of foregut.
Mesonephric (wolffian duct) develops into?
SEED: Seminal vesicles, epididymis, ejaculatory duct, and ductus deferens.
Paramesonephric (mullerian) duct develops into?
Fallopian tube, uterus, and part of the vagina.
Genital homologues:
Genital tubercle
Glans penis.
Glans clitoris.
Urogenital sinus
Vestibular bulbs, corpus spongiosum.
Bulbourethral glands, Greater vestibular glands.
Prostate gland, urethral and paraurethral glands.
Urogenital folds
Ventral shaft of penis. Labia minora.
Labioscrotal swelling.
Scrotum, labia majora.