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EMBRYOLOGY > CVS MCQs ( not LO) > Flashcards

CVS MCQs ( not LO) Flashcards

1
Q

when beating begins?

A

21st day

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2
Q

when heart starts pumping blood?

A

24th to 25th day.

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3
Q

which cells differentiate into cardiac progenitor cells?

A

Mesodermal cells in yolk sac, connecting stalk, allantois and embryo proper

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4
Q

when does the primitive heart starts beating?

A

21st- 23rd days

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5
Q

Truncus arteriosus derivative

A

Pulmonary trunk and ascending aort

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6
Q

Bulbus cordis

A

Smooth parts of right and left ventricles

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7
Q

Primitive ventricle

A

Rough parts of right and left ventricles

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8
Q

Primitive atrium

A

Rough parts of right and left atria (including auricles)

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9
Q

Sinus venosus

A

Smooth part of right atrium

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10
Q

Right horn of sinus venosus

A

Smooth part of right atrium

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11
Q

Left horn of sinus venosus

A

Coronary sinus

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12
Q

Ascending aorta

A

Truncus arteriosus

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13
Q

Arch of aorta

A

Aortic sac, left horn of aortic sac, left 4th arch artery and left dorsal aorta

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14
Q

Descending aorta

A

Left dorsal aorta below the level of left 4th arch artery and fused median dorsal aorta

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15
Q

Pulmonary trunk

A

Truncus arteriosus

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16
Q

Pulmonary artery

A

Proximal part of sixth arch

17
Q

Ligamentum arteriosum

A

Ductus arteriosus (degenerates after birth)

18
Q

Brachiocephalic trunk

A

Right horn of aortic sac

19
Q

Common carotid artery

A

Proximal part of 3rd arch

20
Q

External carotid artery

A

External carotid bud

21
Q

Internal carotid artery

A

Distal part of 3rd arch and cranial part of dorsal aorta

22
Q

Right subclavian artery

A

Right 4th arch, right dorsal aorta, right 7th cervical intersegmental artery

23
Q

Left subclavian artery

A

Left 7th cervical intersegmental artery

24
Q

where Initially the heart tube lies

A

ventral to the pericardial cavity.

25
Q

After the formation of the head fold it comes to lie

A

dorsal side of the pericardial cavity,
cranial to septum transversum
caudal to oropharyngeal membrane.

26
Q

The heart tube is suspended from body wall by

A

double layered dorsal mesocardium

27
Q

The splanchnopleuric intraembryonic mesoderm forms what in between the heart tube and pericardial cavity.

A

myoepicardial mantle

28
Q

what are derived from the cardiac jelly(myoepicardial mantle).

A

The myocardium and epicardium

29
Q

what are derived from somatopleuric intra embryonic mesoderm.

A

The parietal layer of pericardium and fibrous pericardium

30
Q

the entire heart and its pericardium originate from?

A

mesoderm

31
Q

formation of the cardiac loop starts on

A

23rd day and is completed on the 28th day

EMBRYOLOGY (12 decks)

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