Final Embryo - Great Vessel Development Flashcards
What are the major pairs of veins draining into the sinus venosus
anterior and posterior cardinal creating the common cardinal
umbilical
vitelline
Which veins drain deoxygenated blood from yolk sac
vitelline
Which veins drain oxygenated blood from placenta
umbilical
Which veins drain deoxygenated blood from body of embryo
cardinal veins
Which cardinal vein drains the region superior to the heart
anterior cardinal
Which cardinal vein drains the region inferior to the heart
posterior cardinal
The left anterior cardinal vein develops an anastomosis with what
right anterior cardinal vein
The caudal portion of the left anterior cardinal vein degenerates becoming the what
left brachiocephalic vein
The right anterior cardinal vein becomes what
right brachiocephalic and superior vena cava
What do the posterior cardinal veins become
root of azygos vein and common iliac veins
What becomes of the right umbilical vein
it degenerates completely
What becomes of the left umbilical vein
it forms the ductus venosus
ligamentum venosum in adults
What is the ductus venosus
it is a venous shunt between the left umbilical vein and IVC
after week 7
What is the purpose of the ductus venosus
It takes the oxygenated blood right to the heart, bypassing the sinusoidal capillaries of the liver
What becomes of the left umbilical vein between the heart and liver
it degenerates
What is the left umbilical vein carrying
it is the only vessel carrying oxygenated blood to the embryonic heart
The right vitelline vein forms what
hepatic portion of IVC
What becomes of the left vitelline vein
it degenerates between the heart and liver
What do the right and left vitelline veins caudal to the liver form
the hepatic portal system
The dorsal aorta remain unfused where
in the region of the pharyngeal arches and distal to that it has fused to form the descending portion
How do pharyngeal arch artery pairs develop
craniocaudally with the pharyngeal arches
This arch artery never forms or is rudimentary and degenerates
5th arch
This pharyngeal arch largely degenerates and the remaining portion becomes the maxillary artery
1st pharyngeal arch
This pharyngeal arch largely degenerates but remaining portions become the stapedial artery
2nd pharyngeal arch
This pharyngeal arch becomes the common carotid and the proximal portions of the internal carotid
3rd pharyngeal arch
The right side of this pharyngeal arch becomes the
4th pharyngeal arch
forms proximal right subclavian artery
The left side of this pharyngeal arch forms
4th pharyngeal arch
forms aortic arch segment from left common carotid artery to left subclavian artery
The right proximal portion of this pharyngeal arch forms
6th pharyngeal arch
proximal right pulmonary artery
The left proximal portion of this pharyngeal arch forms
6th pharyngeal arch
proximal left pulmonary artery
The left distal portion of this pharyngeal arch forms
6th pharyngeal arch ductus arteriosus (ligamentum arteriosum)
This nerve hooks under the 6th pharyngeal arch and elongates as its dragged caudally due to heart repositioning
recurrent laryngeal nerve
The right recurrent laryngeal nerve hooks behind what
right subclavian artery
The left recurrent laryngeal nerve hooks under what
ligamentum arteriosum
This forms the proximal portion of the aortic arch and the brachiocephalic trunk
aortic sac
This forms the ascending aorta and the pulmonary trunk
truncus arteriosus
The unfused portions on the left side of the dorsal aorta form what
rest of aortic arch distal to left subclavian artery
The vitelline arterial plexus form what
celiac trunk
SMA
IMA
The umbilical artery carries what
deoxygenated blood from embryo to placenta
The umbilical vein carries what
oxygenated blood from placenta to sinus venosus of embryonic heart
Each umbilical artery arises from what
from caudal dorsal aorta (site of future common iliac artery) and courses through connecting stalk to placenta
What does the umbilical artery form in adults
internal iliac (proximal) superior vesical (proximal) medial umbilical ligament (distal)
Where does the oxygen supply come before and after birth
before; from placenta
after; from lungs
What does the foramen ovale become after birth
fossa ovalis
What does the ductus arterioles become after birth
ligamentum arteriosum
What does the ductus venosus become after birth
ligamentum venosum
What does the umbilical vein become after birth
ligamentum teres hepatic
What does the distal umbilical artery become after birth
medial umbilical ligaments
