UNSW Embryology
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DEVELOPMENT OF THE HEART AND
CARDIOVASCULAR SYSTEM
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Embryology Home
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Links embryo's
venous blood About
Notes
Next page Human
Embryo sections (st 22)
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1 | Introduction
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2 | Questions
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3 | Pig
Stage 13/14
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4 | Human
(Stage22)
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5 | Selected
Human highpower
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G7
An overview of blood flow through the embryo of
oxygenated blood. Note the umbilical artery and
veins anastomose within the chorion of the
placenta, there is no direct connection of maternal
and foetal blood.
Maternal Blood
umbilical vein
liver
anastomosis
ductus venosus
sinus venosus
atria ventricles
truncus arteriosus
aortic sac
aortic arches
dorsal aorta
pair of umbilical arteries
Maternal Blood
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The
low pressure pathway of the embryo's venous
blood.
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B1:
Identify the large veins lateral to dorsal aortae -
these are the superior or anterior cardinal veins
which drain the head region. Now go directly to
D6.
D6:
Identify the large veins lateral to dorsal aortae -
these are the inferior or posterior cardinal veins
which drain the lower part of the embryo.
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Follow alternately, the course of the
superior cardinal veins caudally, and the course of
the inferior cardinal veins cranially until they
emerge about Dl -C5 into the common cardinal
veins.
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C7:
Left common cardinal entering sinus venosus.
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C5:
Right common cardinal entering sinus venosus.
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Next page for
embryonic blood flow
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Human Embryo sections (st
22)
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About Notes
- Lecture notes from the Anat 3311 1997
Science Embryology course compiled and written by Dr
Mark Hill. Some notes derived from historic
class notes.
- Note Links to OMIM Entries are copies of originals
for computers without internet access. Computers with
internet access can directly access the database.
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m.hill@unsw.edu.au
Date Last Modified: 11/3/99
This site maintained by Dr M. Hill
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