embryology

Question 1

Bulbus cordis

Answer 1

ventricular system

Question 2

3rd + 4th + 6th pharyngeal arches

Answer 2

aortic arch near where the coarctation happens

Question 3

Sup. malignment of the subpulmunary infundibulum

Answer 3

TOF

Question 4

TOF clues

Answer 4

1. Pulm stenosis
2. VSD
3. overriding the aorta
4. right ventricular hypetrophy

Question 5

Septum secundum

Answer 5

Septum between 2 Atria

Question 6

Septum primum

Answer 6

divide atrium from left and right

Question 7

something wrong with the aorticopulmonary septum

Answer 7

transposition of the great vessels

Question 8

Truncas arteriousus leads to the

Answer 8

Aorta

Question 9

Bulbous cords leads to

Answer 9

Pulmonary trunk

Question 10

Bulbous septum leads to

Answer 10

interventricular spetum

Question 11

The fetal left atrium is mainly derived from the:

Answer 11

primordial pulmonary vein

Question 12

The fetal right atrium is mainly derived from the:

Answer 12

sinus venosus

Question 13

Closure of the foramen primum results from fusion of the:

Answer 13

septum primum and endocardial cushions

Question 14

Transposition of the great arteries was diagnosed in a male infant with obvious cyanosis and mild rapid breathing. This condition results from:

Answer 14

faulty partitioning of the bulbus cordis and truncus arteriosus

Question 15

The proximal part of the pulmonary arteries is formed by which aortic arch?

Answer 15

Sixth

Question 16

Which of the following forms the right subclavian artery?

Answer 16

aortic arch 4 and 7th intersegmental artery

Question 17

The endocardial heart tubes which coalesce to form the primitive heart are derived from which of the following germ layers?

Answer 17

mesoderm

Question 18

The proximal (ascending) part of the aorta is formed from which of the following?

Answer 18

The truncus arteriosus forms the ascending aorta.

Question 19

A failure of the atrioventricular cushions to fuse will lead to which of the following malformations?

Answer 19

persistent common atrioventricular canal

Question 20

A partial development of the aorticopulmonary septum will lead to which of the following malformations?

Answer 20

Failed aorticopumonary septal development results in persistent truncus arteriosus, which requires ventricular septal defect in order to survive.

Question 21

Excessive resorption of the septum primum or septum secundum will lead to:

Answer 21

The septum primum has two holes (ostium primum and secundum), while the septum secundum has one. Before these septa fuse, the opening is called the foramen ovale. When these two septa fuse at birth, the remnant is the fossa ovale. Excessive resorption of one of the septa leads to ostium secundum atrial septal defect.

Question 22

A misaligned development of the aorticopulmonary septum will lead to

Answer 22

TOF

Question 23

A non-spiral development of the aorticupulmonary septum may lead to which of the following?

Answer 23

Transposition

Question 24

The common carotid artery is derived from which of the following aortic arches?

Answer 24

arch 3

Question 25

The embryonic origin of the ligamentum arteriosum is from the:

Answer 25

6th arch

Question 26

aortic arches

Answer 26

join the aortic sac to the dorsal aorta

Question 27

right horn of the sinus venosus

Answer 27

forms the smooth walled portion of the right atrium