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C.A2 CVS > L16: Cardiac Development > Flashcards

L16: Cardiac Development Flashcards

1
Q

What is the origin of the heart?

A

Mesoderm

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2
Q

What are the 2 primitive heart tubes formed from?

A

Mesenchyme

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3
Q

What happens to the heart during weeks 4-7?

A

It undergoes looping followed by septation

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4
Q

Which chamber does blood enter the heart from?

A

Sinus venosus

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5
Q

Which chamber is above the sinus venosus?

A

The primitive atrium

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6
Q

Which chamber is above the primitive atrium?

A

The primitive ventricle

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7
Q

Which chamber is above the primitive ventricle?

A

The bulbus cordis

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8
Q

What is above the bulbus cordis?

A

The truncus arteriosus

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9
Q

What is the aorta formed from?

A

The truncus arteriosus

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10
Q

What does the bulbus cordis form?

A

Both ventricles

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11
Q

What does the primitive ventricle form?

A

The rough part of both ventricles

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12
Q

What does the primitive atrium form?

A

The rough part of both atriums

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13
Q

What does the sinus venosus form?

A

The smooth part of the right atrium

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14
Q

Which part does the spiral septum divide?

A

The truncus region

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15
Q

When does atrial septum formation begin?

A

End of the 4th week

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16
Q

Which part descends from the roof of the atrium?

A

Septum primum

17
Q

What is the tip of the membranous portion of the inter-ventricular septum called?

A

Endocardial cushions

18
Q

What causes transposition of the great vessels?

A

Caused by spiral septum defect

19
Q

What is tetralogy of fallot

A

Caused by displacement of the spiral septum

20
Q

What characterizes tetralogy of fallot?

A

Pulmonary artery tightening, right ventricular hypertrophy

21
Q

What is patent ductus arteriosus?

A

When the aorta feeds into the pulmonary artery

22
Q

What is dextocardia characterized by?

A

Apex being at the right side

23
Q

What causes dextocardia?

A

Abnormal looping of the heart

C.A2 CVS (6 decks)

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