Cardiac Embryology

Question 1

All major organ systems, including the cardiovascular system is formed between the ____ and ____ week of development

Answer 1

3rd and 8th

Question 2

When is the embryo most susceptible to interfere with development

Answer 2

between the 3rd and 8th week of development

Question 3

The cephalic portion of the heart tube within the first stage of cardiac embryology develops which system

Answer 3

arterial system

Question 4

The caudal portion of the heart tube within the first stage of cardiac embryology develops which system

Answer 4

systemic venous system

Question 5

Day __ and __ is considered the first stage of cardiac embryology

Answer 5

day 21 and 22

Question 6

after the single tubular structure forms, in stage II, the structure bends to the __ to form the ______________

Answer 6

right;
atrioventriculobulbar loop

Question 7

The cephalic aspect of the cardiac loop in stage II is called _______

Answer 7

bulbus cordis

Question 8

what forms the truncus arteriosus in stage II of embryology

Answer 8

the bulbus cordis

Question 9

if the tubular structure in stage II of development bends to the left instead of the right, what is the result

Answer 9

congenitally corrected left transposition

Question 10

In what stage do the four cardiac chambers form

Answer 10

STAGE III day 27-35

Question 11

what is formed between the atria in Stage III

Answer 11

septum primum
septum secundum

Question 12

what descends from the top of the atria and form first in STAGE III

Answer 12

septum primum

Question 13

what develops to the right of the septum premium and grows from ventral to dorsal

Answer 13

septum secundum

Question 14

the _______ septum forms from the septa in several regions in stage III

Answer 14

ventricular

Question 15

what develops within the right atrium in stage III

Answer 15

AV node and SA node

Question 16

when does placental circulation begin

Answer 16

stage III

Question 17

during stage IV of embryology, how many pairs of arches are formed from the truncus arteriosus

Answer 17

6 pairs

Question 18

which pairs of the aortic arch, disappear

Answer 18

1,2,5

Question 19

which pair forms the aortic arch and the right subclavian artery

Answer 19

4th pair

Question 20

what does the 6th pair of the aortic arch form

Answer 20

the left forms the left pulmonary artery and DA
the right forms the right pulmonary artery

Question 21

In stage IV, what happens if the truncus arteriosus doesn’t separate after it is divided into the aorta and pulmonary artery

Answer 21

perisistent truncus arteriosus

Question 22

In stage IV, what happens if the truncus arteriosus doesn’t spiral after it is divided into the aorta and pulmonary artery

Answer 22

transposition resulted

Question 23

In stage IV, what happens if the pulmonary artery is smaller within

Answer 23

TOF