ZOO 4605 Lecture Notes - Lecture 3: Superior Vena Cava, Azygos Vein, Renal Vein
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ZOO 4605-A001
05/21/18
Umbilical cord
oContains 2 umbilical arteries and 1 umbilical vein
At the beginning, we have multiple aortic arches, only 1 stays
Sinus Venuses
oLower part of heart two
oReceive heart from 3 veins
Vitelline vein
Comes from yolk sac
Becomes other future veins in our body
Part of hepatic vein and portal vein which is result of left and
right vitelline veins
Common cardinal vein
2 branches
Anterior cardinal vein
Posterior cardinal vein
Only exist in embryo
Collects blood from thoracic and abdominal vein
Umbilical vein
Right umbilical vein degenerates and disappears
Left umbilical vein remains which is the connection between the
placenta and inferior vena cava
Connection is called the ductus venosus
After birth it becomes ligamentum Venuses or
ligamentum teres
Liver blood vessels/ tissues?
Right posterior cardinal veins gives rise to root of azygous vein on right side which drains into
superior vena cava
oAzygous vein collects deoxygenated blood from ribs, intercostal spaces, in thoracic
cavity
Lower part of left and right posterior cardinal vein gives rise to common iliac veins
Left anterior cardinal vein has cell proliferation towards right anterior cardinal vein which
continues with right common cardinal vein to form common brachiocephalic cein and upper part
of superior veina cava and small part of right brachiocephalic vein
Left common cardinal vein degenerates
Parallel to cardinal veins are 2 more veins
oSub-cardinal vein
Green in picture
Gives rise to left and right suprarenal (adrenal) veins, left and right gonadal
veins (testicular in male and ovarian vein in female), and part of inferior vena cava
The left side of pic has an extra vein which is the left renal vein!
oSupra-cardinal vein
Purple in picture
find more resources at oneclass.com
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Gives rise to lower part of azygous vein on the right side and the hemi-azygous
vein from the left side
They collect deoxygenated blood from the thoracic cavity, especially
between the ribs
Lower part of supracardinal vein gives rise to the inferior vena cava
The lower, colored part of picture
oBoth have left and right side
Inferior vana cava
oOrigins (4) slide 9
Proximal part of right vetilline vein gives rise to hepatic portio of inferior vena
cava
Right supcardinal vein
Pre-renal vein segment
Renal segment
Right subcardinal vein
Aorta's name is dorsal aorta in embryo
oDorsal aorta gives some branches called the segmental arteries
Also gives some arches of aorta
1 of the arches persist and the rest degenerate
First few segmental arteries become the vertebral artery
Next few segmental arteries become intercostal arteries
Next segmental arteries become lumbar arteries
Vitelline artery comes from the yolk sac
oAt the end of the first trimester, the yolk sac degenerates and becomes smaller
oVetelline artery becomes future celiac artery
Feeds upper part of GI tract
Gives blood to liver, stomach, spleen, superior part of duodenum, and
head (superior part) of the pancreas
Second branch becoems superior mesenteric arter
Gives blood to appendix, lower part of duodenum, jejunum, ileum,
cecum, ascending colon, two thirds of the transverse colon
Thrid branch becomes the inferiro mesenteric artery
Gives blod to Left 1/3 of the transverse colon, descending colon,
sigmoid colon, upper part of rectum
Blood supply of rectum is different
Has 3 parts
Superior part comes from the inferior
mesenteric artery
Middle and inferior parts of rectum receive
blood from indirect and direct rectal arteries which are
branches of internal iliac artery (left and right)
Circulation
oThrough primordial heart
Fetal
Umbilical vein takes oxygenated blood from placenta and is connected
to inferior vena cava by ductus venosus
Then it releases into inferior vena cava which carries fresh blood into
right atrium
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Contains 2 umbilical arteries and 1 umbilical vein. At the beginning, we have multiple aortic arches, only 1 stays. Part of hepatic vein and portal vein which is result of left and right vitelline veins. Left umbilical vein remains which is the connection between the placenta and inferior vena cava. After birth it becomes ligamentum venuses or ligamentum teres. Right posterior cardinal veins gives rise to root of azygous vein on right side which drains into superior vena cava: azygous vein collects deoxygenated blood from ribs, intercostal spaces, in thoracic cavity. Lower part of left and right posterior cardinal vein gives rise to common iliac veins. Left anterior cardinal vein has cell proliferation towards right anterior cardinal vein which continues with right common cardinal vein to form common brachiocephalic cein and upper part of superior veina cava and small part of right brachiocephalic vein. Parallel to cardinal veins are 2 more veins o.
