aortic arches and venous system

Question 1

Aortic Sac

Answer 1

• Ascending Aorta • Aortic Arch • Brachiocephalic Artery

Question 2

First Arches

Answer 2

• Maxillary Artery (portion)

Question 3

Second Arches

Answer 3

• Stapedial Artery (portion)

Question 4

Third Arches

Answer 4

Carotid Arteries

Question 5

Fourth Arches

Answer 5

• Right – Proximal Right Subclavian Artery

* Left – Aortic arch segment between left carotid and left subclavian artery

Question 6

Fifth Arches

Answer 6

Transient and never well-developed

Question 7

• Sixth Arches

Answer 7

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

Question 8

Right Dorsal Aorta

Answer 8

• Portion becomes the right subclavian

Question 9

Left Dorsal Aorta

Answer 9

Distal aortic arch and descending aorta

Question 10

Right Intersegmental Artery

Answer 10

Part of right subclavian artery

Question 11

Left Intersegmental Artery

Answer 11

Left subclavian artery

Question 12

Communication will eventually shift to the right

Answer 12

Occurs at about 4-5 weeks.

Question 13

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

Answer 13

5th week

Question 14

At week 10

Answer 14

left common cardinal vein become obliterated

Question 15

All that remains of the left sinus horn is the

Answer 15

oblique vein of the left

atrium and the coronary sinus.

Question 16

Left venous valve fuses

Answer 16

with the atrial septum

Question 17

Superior part of the right venous valve

Answer 17

disappaers

Question 18

Inferior part of the right venous valve becomes

Answer 18

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

Question 19

Vitellineveins

Answer 19

Carry blood from the yolk sac to the

sinus venosus

Question 20

Umbilicalveins

Answer 20

Originate in the chorionic villi and carry

oxygenated blood to the embryo

Question 21

Common cardinal veins

Answer 21

Drain the body of the embryo

Question 22

Vitelline venous system

Answer 22

Enters the sinus venosus • Gives rise to the hepatic veins

Question 23

Umbilical venous system •

Answer 23

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

Question 24

• Cardinal venous system

Answer 24

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

Question 25

Right Vitelline vein is transforming into a structure

Answer 25

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

Question 26

The left umbilical vein has joined

Answer 26

the hepatic system.

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

Question 27

subcardinohepatic anastomosis

Answer 27

This was once the right umbilical vein.

Question 28

left sinus horn eventually becomes

Answer 28

coronary sinus. left oblique vein of LA

Question 29

The anterior cardinal veins now have a channel between them

Answer 29

(the left brachiocephalic vein).

• These cardinal veins will drain the entire head and upper extremities.