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Embryology 2
Embryo First Aid 2012
20
Medical
Professional
05/26/2013

Additional Medical Flashcards

 


 

Cards

Term
Truncus arteriosus becomes ___
Definition
Ascending aorta and pulmonary trunk
Term
Bulbus cordis becomes ___
Definition
smooth parts (outflow tract) of left and right ventricle
Term
Left horn of sinus venosus becomes ___
Definition
Coronary sinus
Term
Right horn of sinus venosus becomes ___
Definition

Smooth part of right atrium

 

Term
Right common cardinal vein and right anterior cardinal vein become ___
Definition
SVC
Term
Allantois becomes ___
Definition

urachus, then closes to becomes the median umbilical ligament

 

if it doesn't close, becomes Patent urachus or Vesicourachal diverticulum (bladder outpouching)

Term
Omphalomesenteric duct becomes ___
Definition

obliterated (Omphalomesenteric duct=Vitelline duct)

 

if not, becomes Vitelline fistula (total failure of closure) or Meckel's diverticulum (partial closure)

Term
Growth of what embryo structure separates atria from ventricles?
Definition
Endocardial cushions
Term
2 causes of patent foramen ovale
Definition
excessive resorption of septum primum and/or secundum (both fuse together to form the atrial septum)
Term
The valve of the foramen ovale is formed from what structure?
Definition

Septum primum

 

Term
Until embryo week 10, fetal blood is formed by the ___
Definition
yolk sac
Term
What forms fetal blood from fetal week 10-30 vs. from week 30 onward?
Definition

Week 10-30: blood made by liver

Week 30 onward: blood made by bone marrow

Term
Type of hemoglobin in fetuses vs. adults
Definition

fetal:α2γ2

adult:α2β2

Term
Umbilical vein becomes ___
Definition
Ligamentum teres hepatis (in falciform ligament)
Term
Umbilical arteries become ___
Definition
medial umbilical ligaments
Term
Ductus arteriosus becomes ___
Definition
Ligamentum arteriosum
Term
Ductus venosus becomes ___
Definition
Ligamentum venosum
Term
Foramen ovale becomes ___
Definition
Fossa ovalis
Term
Notochord becomes ___
Definition
Nucleus pulposus of intervertebral disc
Term
Describe blood flow in a fetal heart starting with the umbilical vein.
Definition

Umbilical vein→ Ductus venosus (bypasses liver)→ IVC→

 

1 (Most): Right atrium→ Foramen ovale→ Aorta

OR

2: Right atrium + Ventricle→ Pulmonary artery→ Ductus arteriosus→ Descending aorta

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