DMS Fetal Echo Midterm questions and answers
with solutions
The vascular system begins in the wall of which structure? - ANSWER Yolk sac
The sinus venosus receives the umbilical, vitelline, and common cardinal veins from which
structures? - ANSWER chorion, yolk sac, embryo
Dextro-looping refers to which heart movement? - ANSWER cephalic portion bends ventrally
and to the right
From which two sources do pulmonary veins originate? - ANSWER presplanchnic and main
pulmonary stem
The fetal heart starts to beat on which day (menstrual age)? - ANSWER 36
Between which weeks are the semilunar valves formed? - ANSWER 5-9
Which veins drain the yolk sac and form the portal and hepatic veins? - ANSWER vitelline
Which vein is the major transport for blood and nutrients from placenta to embryo? - ANSWER
left umbilical
Which aortic arches (pair) form the common, internal and external carotid arteries? - ANSWER
third
Which pair of aortic arches become the definitive aorta, right subclavian artery and innominate
artery? - ANSWER fourth
, Put the following structures in order from the first to develop to the last to develop:
interventricular septum
truncoconal ridge
interatrial septum
primitive heart tube - ANSWER 1. primitive heart tube
2. interatrial septum
3. interventricular septum
4. truncoconal ridge
The right ventricle is identified by the presence of which structure? - ANSWER moderator band
Which is the most superior portion of the atrial septum? - ANSWER sinus venosus
Which structure(s) enter the left atrium posteriorly? - ANSWER pulmonary veins
Which layer of the heart is considered the muscular layer? - ANSWER myocardium
Which vessel does not arise directly from the aortic arch? - ANSWER right common carotid
In the normal fetal heart, which cardiac chamber is closest to the fetal spine? - ANSWER left
atrium
In the normal fetal heart, which cardiac chamber is closest to the anterior chest wall? - ANSWER
right ventricle
with solutions
The vascular system begins in the wall of which structure? - ANSWER Yolk sac
The sinus venosus receives the umbilical, vitelline, and common cardinal veins from which
structures? - ANSWER chorion, yolk sac, embryo
Dextro-looping refers to which heart movement? - ANSWER cephalic portion bends ventrally
and to the right
From which two sources do pulmonary veins originate? - ANSWER presplanchnic and main
pulmonary stem
The fetal heart starts to beat on which day (menstrual age)? - ANSWER 36
Between which weeks are the semilunar valves formed? - ANSWER 5-9
Which veins drain the yolk sac and form the portal and hepatic veins? - ANSWER vitelline
Which vein is the major transport for blood and nutrients from placenta to embryo? - ANSWER
left umbilical
Which aortic arches (pair) form the common, internal and external carotid arteries? - ANSWER
third
Which pair of aortic arches become the definitive aorta, right subclavian artery and innominate
artery? - ANSWER fourth
, Put the following structures in order from the first to develop to the last to develop:
interventricular septum
truncoconal ridge
interatrial septum
primitive heart tube - ANSWER 1. primitive heart tube
2. interatrial septum
3. interventricular septum
4. truncoconal ridge
The right ventricle is identified by the presence of which structure? - ANSWER moderator band
Which is the most superior portion of the atrial septum? - ANSWER sinus venosus
Which structure(s) enter the left atrium posteriorly? - ANSWER pulmonary veins
Which layer of the heart is considered the muscular layer? - ANSWER myocardium
Which vessel does not arise directly from the aortic arch? - ANSWER right common carotid
In the normal fetal heart, which cardiac chamber is closest to the fetal spine? - ANSWER left
atrium
In the normal fetal heart, which cardiac chamber is closest to the anterior chest wall? - ANSWER
right ventricle
