Embryology Flashcards

1
Q

Gives rise to ascending aorta and pulmonary trunk

A

Truncus arteriosus

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2
Q

Gives rise to smooth parts of left and right ventricles

A

Bulbus cordis

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3
Q

Gives rise to atrial septum, membranous interventricular septum; AV and semilunar valves

A

Endocardial cushions

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4
Q

Gives rise to the trabeculated part of left and right atria

A

Primitive atrium

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5
Q

Gives rise to trabeculated part of left and right ventricles

A

Primitive ventricles

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6
Q

Gives rise to the smooth part of left atrium

A

Primitive pulmonary vein

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7
Q

Gives rise to coronary sinus

A

Left horn of sinus venosus

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8
Q

Gives rise to smooth part of right atrium

A

Right horn of sinus venosus

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9
Q

Gives rise to superior vena cava

A

Right common cardinal vein and right anterior cardinal vein

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10
Q

First functional organ in vertebrae embryos

A

Heart

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11
Q

Gestational age heart begins to beat

A

4th week

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12
Q

Process that establishes left-right polarity of heart during 4th week of development

A

Cardiac looping

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13
Q

Primary ciliary dyskinesia

A

Kartagener syndrome

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14
Q

Protein involved in left-right polarity, when defective leads to dextrocardia

A

Dynein

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15
Q

Structures that fuse to form atrial septum

A

Septum primum and septum secundum

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16
Q

First septum to form in heart development

A

Septum primum

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17
Q

First foramen to form in heart development

A

Foramen secundum

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18
Q

Structure that maintains right-to-left shunt during heart development

A

Foramen secundum

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19
Q

Forms valve of foramen ovale

A

Remaining portion of septum primum

20
Q

Structure that covers majority of foramen secundum

A

Septum secundum

21
Q

Causes foramen ovale to close soon after birth

A

Increased left atrial pressure

22
Q

Caused by failure of septum primum and septum secundum to fuse after birth

A

Patent foramen ovale

23
Q

Consequence of patent foramen ovale seen in ASD

A

Paradoxical emboli

24
Q

First septum to form in ventricles

A

Muscular interventricular septum

25
Q

Most common congenital cardiac anomaly occurring in membranous septum

A

VSD

26
Q

Separates atria from ventricles and contributes to atrial and ventricular septation

A

Growth of endocardial cushions

27
Q

Rotates and fuses with muscular ventricular septum to form membranous interventricular septum, closing interventricular foramen

A

Aorticopulmonary septum

28
Q

Heart valves derived from endocardial cushions of outflow tract

A

Aortic and pulmonary valves

29
Q

Heart valves derived from fused endocardial cushions of the AV canal

A

Mitral and tricuspid valves

30
Q

Part of allantoic duct between bladder and umbilicus

A

Urachus

31
Q

Adult structure derived from allantois

A

Median umbilical ligament

32
Q

Adult structure derived from ductus arteriosus

A

Ligamentum arteriosum

33
Q

Adult structure derived from ductus venosus

A

Ligamentum venosum

34
Q

Adult structure derived from foramen ovale

A

Foramen ovalis

35
Q

Adult structure derived from notochord

A

Nucleus pulposus

36
Q

Adult structure derived from umbilical arteries

A

Medial umbilical ligaments

37
Q

Adult structure derived from umbilical vein

A

Ligamentum teres hepatis (round ligament)

38
Q

Structure contained in falciform ligament

A

Round ligament of the liver (ligamentum teres hepatis)

39
Q

Embryonic structure that bypasses hepatic circulation

A

ductus venosus

40
Q

Embryonic vessel with highest O2 saturation

A

umbilical vein

41
Q

Function of ductus venosus

A

Shunts blood from umbilical vein to IVC bypassing hepatic circulation

42
Q

Structure in embryonic heart that shunts blood from IVC to right atria and eventually ends in aorta

A

Foramen ovale

43
Q

Embryonic structure that shunts blood entering right heart to descending aorta bypassing pulmonary circulation

A

Ductus arteriosus

44
Q

Vessels that contain the lowest O2 saturation

A

Umbilical arteries

45
Q

Responsible for closing ductus arteriosus

A

Increased O2 tension and decreased prostaglandins

46
Q

Drug given to close patent ductus arteriosus

A

Indomethacin

47
Q

Endogenous compound that keeps PDA open

A

Prostaglandins E1 and E2