embryology of heart and great vessels Flashcards

1
Q

where does the heart come from?

A
  • visceral mesoderm
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2
Q

how does the heart reach its final position?

A
  • lateral folding

- cranio-caudal folding

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3
Q

what are the different heart tube regions of the heart?

A
  • truncus arteriosus
  • bulbus cordis
  • ventricle
  • atrium
  • sinus venosus
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4
Q

what are the adult derivatives of the truncus arteriosus?

A
  • aorta

- pulmonary trunk

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5
Q

what are the adult derivatives of the bulbus cordis?

A
  • trabeculated part of right ventricle

- outflow part of both ventricles

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6
Q

what are the adult derivatives of the ventricle?

A
  • trabeculated part of left ventricle
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7
Q

what are the adult derivatives of the atrium?

A
  • trabeculated part of both atria
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8
Q

what are the adult derivatives of the sinus venosus? (right and left horns)

A
  • smooth part R. atrium

- coronary sinus

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9
Q

how does the heart loop and fold?

A
  • atrium > dorsal and cranial
  • ventricles > displaced left
  • bulbus cordis > inferiorly, ventrally to the right
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10
Q

how do the aortic arches develop?

A
  • there are 6 pairs associated with pharyngeal arches
  • 1 and 2 are mostly obliterated
  • 5 = rudimentary of absent
  • 3 = common carotid aa, fist part of ICA
  • 4 = right subclavian a, part of aortic arch
  • 6 = sprout branches that form pulmonary aa, ductus arteriosus on left
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11
Q

which vessels enter the right and left horns of the sinus venosus?

A
  • vitelline vein
  • umbilical vein
  • cardinal vein
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12
Q

where does the vitelline vein drain?

A
  • yolk sac
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13
Q

where does the umbilical veins drain?

A
  • oxygenated blood from placenta
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14
Q

where does the cardinal act as precursors for?

A
  • systemic venous system
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