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Flashcards in aortic arches and venous system Deck (29):
1

Aortic Sac

• Ascending Aorta • Aortic Arch • Brachiocephalic Artery

2

First Arches

• Maxillary Artery (portion)

3

Second Arches

• Stapedial Artery (portion)

4

Third Arches

Carotid Arteries

5

Fourth Arches

• Right – Proximal Right Subclavian Artery
• Left – Aortic arch segment between left carotid and left subclavian artery

6

Fifth Arches

Transient and never well-developed

7

• Sixth Arches

• Right – • Proximal - Proximal right pulmonary artery • Distal - distal portion disappears
• Left – • Proximal – Proximal left pulmonary artery • Distal–DuctusArteriosus

8

Right Dorsal Aorta

• Portion becomes the right subclavian

9

Left Dorsal Aorta

Distal aortic arch and descending aorta

10

Right Intersegmental Artery

Part of right subclavian artery

11

Left Intersegmental Artery

Left subclavian artery

12

Communication will eventually shift to the right

Occurs at about 4-5 weeks.

13

Obliteration of the right umbilical vein and left vitelline vein • Occurs

5th week

14

At week 10

left common cardinal vein become obliterated

15

All that remains of the left sinus horn is the

oblique vein of the left
atrium and the coronary sinus.

16

Left venous valve fuses

with the atrial septum

17

Superior part of the right venous valve

disappaers

18

Inferior part of the right venous valve becomes

the valve of the inferior vena cava and the valve of the coronary sinus.

19

Vitellineveins

Carry blood from the yolk sac to the
sinus venosus

20

Umbilicalveins

Originate in the chorionic villi and carry
oxygenated blood to the embryo

21

Common cardinal veins

Drain the body of the embryo

22

Vitelline venous system

Enters the sinus venosus • Gives rise to the hepatic veins

23

Umbilical venous system •

Enter the sinus venosus lateral to the vitelline veins. • Persists as the umbilical vein in the term fetus.

24

• Cardinal venous system

• Enters the sinus venosus lateral/superior to the umbilical veins • Forms a large complex network of veins throughout the body.

25

Right Vitelline vein is transforming into a structure

that will eventually be the hepatic veins and all of the veins of the hepatic portal system.

26

The left umbilical vein has joined

the hepatic system.
The left umbilical vein will persist in the fetus as the umbilical vein.

27

subcardinohepatic anastomosis

This was once the right umbilical vein.

28

left sinus horn eventually becomes

coronary sinus. left oblique vein of LA

29

The anterior cardinal veins now have a channel between them

(the left brachiocephalic vein).
• These cardinal veins will drain the entire head and upper extremities.