shosh: embryo

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shosh114
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93183
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shosh: embryo
Updated:
2011-07-07 10:45:02
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  1. Maxillary artery derives from...
    First aortic arch
  2. Hyoid artery derives from...
    Second aortic arch
  3. Stapedial artery derives from...
    Second aortic arch
  4. Common carotids derive from...
    Third aortic arch
  5. Proximal internal carotids derive from...
    Third aortic arch
  6. Arch of the aorta derives from...
    Fourth aortic arch
  7. Right subclavian derives from...
    Fourth aortic arch
  8. Pulmonary arteries derive from...
    Sixth aortic arch
  9. Ductus arteriosus derives from...
    Sixth aortic arch
  10. Ascending aorta and pulmonary trunk derive from...
    Truncus arteriosus
  11. RV and outflow tracts of LV and RV derive from...
    Bulbus cordis
  12. Coronary sinus derives from...
    Left horn of sinus venosus
  13. Smooth part of RA derives from...
    Right horn of sinus venosus
  14. Trabeculated parts of LA and RA derive from...
    Primitive atrium
  15. Right common and anterior cardinal veins develop into...
    SVC
  16. Structures of primitive heart, from top to bottom:
    Truncus arteriosus, bulbus cordis, primitive ventricle, primitive atrium, sinus venosus
  17. Derivatives of first branchial arch
    • Cartilage: jaw bones
    • Muscle: muscles of mastication, anterior 2/3 of tongue
    • Nerves: V2 and V3
    • Arteries: maxillary (branch of external carotid)
  18. Treacher-Collin's syndrome
    • Failure of neural crest cells to migrate to first branchial arch
    • Mandibular hypoplasia, facial abnormalities
  19. Derivatives of second branchial arch
    • Cartilage: stapes, stylohyoid
    • Muscles: muscles of facial expression, posterior belly of digastric
    • Nerves: VII
    • Arteries: stapedial and hyoid
  20. Derivatives of third branchial arch
    • Cartilage: greater horn of hyoid
    • Muscle: stylopharyngeus
    • Nerves: IX
    • No arteries
  21. Congenital pharyngocutaneous fistula
    Persistence of third pharyngeal cleft and pouch causes fistula between tonsillar areas and cleft in lateral neck
  22. Derivatives of fourth--sixth branchial arch
    • Cartilage: thyroid, cricoid, arytenoids
    • Muscle: pharyngeal constrictors, cricothyroid, intrinsic muscles of larynx
    • Nerves: X (speaking and swallowing)
  23. Derivatives of first branchial pouch
    Middle ear
  24. Derivatives of second branchial pouch
    Epithelial lining of palatine tonsils
  25. Derivatives of third branchial pouch
    • Dorsal wings develop into inferior parathyroids
    • Ventral wings develop into thymus
  26. Derivatives of fourth pharyngeal pouch
    • Dorsal wings develop into superior parathyroids, ventral wings degenerate
    • Parafollicular cells
  27. Di George syndrome
    Failure of third and fourth pharyngeal pouches to develop results in thymic aplasia (immunodeficiency) and hypocalcemia
  28. MEN IIa--mutation of germline RET
    Hyperplasia of neural crest cell derivatives results in pheo, parathyroid tumor, and medullary carcinoma of the thyroid (tumor of parafollicular, calcitonin producing cells)
  29. Thyroglossal duct
    Connects primitive thyroid to tongue. Foramen cecum is adult derivative. Failure to degenerate results in thyroglossal duct cyst in midline of neck. Most common site of ectopic thyroid tissue is the tongue.
  30. Central tendon of the diaphragm is derived from...
    Septum transversum (most cranial structure in 3-week fetus)
  31. Crura of diaphragm develop from...
    Dorsal mesentery of esophagus
  32. Timeline of midgut herniation
    Herniates in sixth week, retracts in tenth week, rotating around SMA
  33. Pancreatic development
    Ventral bud becomes pancreatic head, uncinate process, and duct, dorsal bud becomes body, tail, isthmus, and accessory duct
  34. Ureteric bud gives rise to...
    Ureter, renal pelvis, collecting duct
  35. Metanephric mesenchyme gives rise to...
    Glomerulus and tubules, up to DCT (induced to develop by ureteric bud)
  36. Most common site of obstruction in fetal hydronephrosis
    Uteropelvic junction
  37. What causes Potter's syndrome?
    Malformation of ureteric bud (cannot induce metanephric mesenchyme to form kidneys)
  38. Bicornate uterus results from...
    Incomplete fusion of paramesonephric ducts

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