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Phase 1 > CVS embryology > Flashcards

CVS embryology Flashcards

1
Q

What are the 5 components of the primitive heart tube?

A 
Truncus arteriosus
Bulbus cordus
Primitive ventricle
Primitive atrium
Sinus venosus
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2
Q

What does the truncus arteriosus form?

A

Ascending aorta

Pulmonary trunk

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3
Q

What does the bulbus cordus form?

A

Smooth (outflow) parts of the left and right ventricles

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4
Q

What does the primitive ventricle form?

A

The majority of the ventricles

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5
Q

What does the primitive atrium form?

A

Both auricular appendages
Entire left atrium
Anterior part of right atrium

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6
Q

What does the sinus venosus form?

A

Smooth part of right atrium
Vena cavae
Coronary sinus

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7
Q

What is the first foramen to form between the right and left atrium?

A

Foramen primum

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8
Q

Which aortic arches disseapear early?

A

Arch 1, 2 and 5

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9
Q

What does the 1st aortic arch form?

A

Maxillary artery

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10
Q

What does 2nd aortic arch form?

A

Stapedial artery

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11
Q

What does the 3rd aortic arch form?

A

Commencement of the internal carotid artery

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12
Q

What does the 4th aortic arch form?

A

Right- Right subclavian artery

Left- aortic arch

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13
Q

What does the 5th aortic arch form?

A

Regresses and doesn’t form anything!!!

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14
Q

What does the 6th aortic arch form?

A

Right- Proximal right pulmonary artery

Left- Left pulmonary artery and part of ductus arteriosus

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15
Q

What does the 7th segmental artery form?

A

Left- Left subclavian artery

Right- Part of right subclavian artery

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16
Q

On what day roughly does the heart start beating?

A

23 (same as when heart begins looping)

17
Q

What is the ligamentum arteriosum?

A

The remenant of the ductus arteriosus

18
Q

How many hours after birth is the constriction of the ductus arteriosus into the ligamentum arteriosum?

A

10-15 hrs

19
Q

What is obstetrical climbing?

A

Constriction of the umbilical vein into the ligamentum teres

20
Q

What is the role of the ductus arteriosus?

A

Shunting of blood from the pulmonary vein into the aorta

21
Q

What causes the forament ovale to close?

A

Increase in left atrial pressure and decrease in right atrial pressure due to first breath

22
Q

What is the fossa ovalis?

A

Remenant of the foramen ovale

23
Q

What is the ligamentum venosum?

A

Remenant of the ductus venosus

24
Q

What was the function of the ductus venosus?

A

Shunting of blood to bypass the liver

25
Q

Which arch is the recurrent laryngeal nerve associated with?

A

The 6th arch

26
Q

What are the two septa that form in the primitive atrium?

A

Septum primum and septum secundum

27
Q

In which septa does the foramen ovale form?

A

Septum secundum

Phase 1 (41 decks)

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