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CVPR exam 2 > Cardiac Embryonic-Fetal Circulation > Flashcards

Cardiac Embryonic-Fetal Circulation Flashcards

1
Q

What does the 1st aortic arch become?

A

disappears- maxillary and ext carotids

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2
Q

When do the tubes fuse together? Why?

A

day 21-22; the embryo folds cephalically and laterally

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2
Q

When do the great arteries develop?

A

days 35-56

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3
Q

What does the R cardinal vein become?

A

SVC brachiocephalic vein innominate veins

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3
Q

The ______ comes from the aortic sac and the ______ comes from the left dorsal.

A

ascending aorta; descending aorta

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4
Q

What are the 3 looping stages?

A
  1. pre-loop 2. loop 3. post-loop
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5
Q

What does the 2nd aortic arch become?

A

disappears- stapedial a

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5
Q

What does the 6th aortic arch become?

A

pulmonary a’s ductus arteriosus

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6
Q

The bulbis cordis becomes the _______.

A

trabeculated portion of the RV

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7
Q

Between the inner and outer layer of the heart tube is a substance called “cardiac jelly” which plays a role in _______.

A

the looping of the heart as well as septation

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7
Q

The ascending aorta comes from the _____ and the descending aorta comes from the _______.

A

aortic sac; left dorsal

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8
Q

The _____ will become the intraventricular septum.

A

Atrioventricular Sulcus

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8
Q

Where does the umbilical vein originate?

A

the placenta

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10
Q

Epiblast cells migrate through the primitive streak, giving rise to the ______.

A

intraembryonic mesoderm

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11
Q

The ______ becomes the aortic and pulmonary valves, the ascending aorta, and the pulmonary trunk.

A

truncus

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13
Q

What are the 3 components of a blastocyst?

A
  1. trophoblast (outer cell mass) 2. embryoblast (inner cell mass) 3. blastocyst cavity (central cavity)
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14
Q

What does the 3rd aortic arch become?

A

carotid a’s

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15
Q

What does the R vitelline vein become?

A

superior mesenteric a IVC hepatic sinusoids

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15
Q

What does the L cardinal vein become?

A

ligament of Marshall

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16
Q

The 2 layers of the embryoblast form a flat disc, called the _____.

A

embryonic disc

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16
Q

The sinus venosus communicates with the primitive atria via the ______.

A

sinoatrial orifice

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17
Q

What does the 5th aortic arch become?

A

disappears

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18
Q

What does the L vitelline vein become?

A

hepatic sinusoids

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19
Q

The truncus becomes the _____.

A

aortic and pulmonary valves the ascending aorta the pulmonary trunk

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20
Q

On what day does the heart begin to beat?

A

day 22

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21
Q

What does the R umbilical vein become?

A

it disappears

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22
Q

At the blastocyst stage, the precardiac cells are located ______ on either side of the _____.

A

within the epiblast; primitive streak

22
Q

Where does the cardinal vein originate?

A

it drains the embryo

23
Q

Between the inner and outer layer of the heart tube is a substance called “cardiac jelly” which plays a role in _______.

A

the looping of the heart as well as septation

24
Q

What does the R sinus horn become?

A

it’s absorbed into the RA

26
Q

Zygote –> Morula –> ______

A

Blastocyst

27
Q

______ cells migrate through the primitive streak, giving rise to the intraembryonic mesoderm.

A

Epiblast

28
Q

The _____ become the L and R atrial appendages.

A

primitive atria

29
Q

At day 16, the cells that will become the CV system are in the ______ and are derived from _____.

A

cardiogenic area; mesodermal cells

31
Q

The Atrioventricular Sulcus will become the ______.

A

intraventricular septum

32
Q

______ –> Morula –> Blastocyst

A

Zygote

32
Q

What are the 3 layers of the gastrula?

A
  1. ectoderm (external) 2. mesoderm (middle) 3. endoderm (internal)
32
Q

The proximal portion of the ______ is the primordium of the trabeculated portion of the RV.

A

Bulbus Cordis

33
Q

Zygote –> ______ –> Blastocyst

A

morula

34
Q

What does the L umbilical vein become?

A

the ductus venosus, which will disappear after birth

36
Q

Between the inner and outer layer of the heart tube is a substance called ______ which plays a role in the looping of the heart as well as septation.

A

“cardiac jelly”

37
Q

The ______ becomes the infundibula of both ventricles.

A

conus

38
Q

What does the 6th aortic arch become?

A

pulmonary a’s ductus arteriosus

39
Q

What surrounds the heart tubes at day 19?

A

splanchnic mesoderm

40
Q

What happens at day 19?

A

cardiogenic cells migrate and begin to form 2 endocardial tubes

41
Q

The ______ communicates with the primitive atria via the sinoatrial orifice.

A

sinus venosus

43
Q

The ______ becomes the trabeculated portion of the RV.

A

bulbis cordis

45
Q

Where does the Vitelline vein originate?

A

the yolk sac

46
Q

When do the atria and ventricles septate?

A

days 28-42

48
Q

The primitive ventricle becomes the _____.

A

trabeculated portion of the LV

49
Q

The precardiac cells are located within the ______ but then migrate cephalically.

A

mesoderm

50
Q

The proximal portion of the Bulbus Cordis is the primordium of the ______ of the RV.

A

trabeculated portion

51
Q

The conus becomes the _______.

A

infundibula of both ventricles

53
Q

The primitive atria become the _______.

A

L and R atrial appendages.

54
Q

What does the L sinus horn become?

A

ligament of Marshall coronary sinus

55
Q

The ______ is the primordium of the trabeculated portion of the LV.

A

Primitive Ventricle

56
Q

What does the 4th aortic arch become?

A

R= R brachiocephalic a, R subclavian a L= transverse aortic arch

57
Q

The sinus venosus communicates with the primitive atria via the ______.

A

sinoatrial orifice

59
Q

Epiblast cells migrate through the primitive streak, giving rise to the ______.

A

intraembryonic mesoderm

60
Q

The Primitive Ventricle is the primordium of the _____ of the LV.

A

trabeculated portion

61
Q

The ______ becomes the trabeculated portion of the LV.

A

primitive ventricle

62
Q

The ascending aorta comes from the _____ and the descending aorta comes from the _______.

A

aortic sac; left dorsal

63
Q

On what day do the cardiogenic cells migrate and begin to form 2 endocardial tubes?

A

day 19

64
Q

Which direction do the primitive atria rotate?

A

posteriorly

65
Q

Where does the cardinal vein originate?

A

the embryo (to drain it)

66
Q

At _____, the cells that will become the CV system are in the cardiogenic area and are derived from mesodermal cells.

A

day 16

67
Q

What are the 2 layers of the embryoblast?

A
  1. epiblast (external layer) 2. hypoblast (internal layer)

CVPR exam 2 (29 decks)

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