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Flashcards in embryo- great vessels Deck (39):
1

during week 4, what Pairs of veins drain into the Sinus Venosus?

1) Anterior cardinal vein
2) posterior cardinal vein
3) umbilical vein
4) Vitelline vein

2

the Sinus venosus drains into what?

sinoatrial canal

3

T/F: only deoxygenated blood enters the sinoatrial canal

false- ALL blood enters through the sinoatrial canal during early development

4

which veins drain deoxygenated blood? oxygenated?

Deoxygenated blood- from The cardinal veins and vitelline

oxygenated- from umbilical vein

5

Left anterior cardinal vein becomes what after it is remodeled?

Caudal portion degenerates

Cranial portion becomes L. brachiocephalic v.

6

the Right anterior cardinal vein becomes which structures after remodeling?

Becomes:
1) R. brachiocephalic vein
2) superior vena cava

7

T/F: Posterior cardinal veins on both sides degenerate during development

true

8

what are the remnants of the posterior cardinal veins?

Root of azygos vein

common iliac veins

9

which umbilical vein degenerates entirely?

right umbilical vein

10

Left umbilical vein forms the _______ _______

ductus venosus

11

what is the Ductus venosus?

-venous shunt between the left umbilical vein and the IVC

- takes the oxygenated blood right to the heart, bypassing the sinusoidal capillaries of the liver

12

which horn of the sinus venosus becomes larger?

right horn

13

the left horn of the sinus venosus forms the _____ _____. what does this structure do?

forms the coronary sinus- it drains into the right atrium.

14

the distal portion of the dorsal aorta fuses to form what?

the descending part of the aorta.

15

how many pairs of pharyngeal arteries arise from the aortic sac?

5

16

1st pharyngeal arch arteries:

Largely Degenerate

Remaining Portions Become Maxillary arteries

17

2nd pharyngeal arch arteries:

Largely Degenerate

Remaining Portions Become Stapedial arteries (middle ear)

18

3rd pharyngeal arch arteries

Form the common carotid arteries

the proximal portions form the internal carotid arteries

19

what do the 4th pharyngeal arch arteries form?
(hint: there are left and right side derivatives)

right side- proximal right subclavian artery

left side- Forms aortic arch segment
(goes from left common carotid to left subclavian arteries)

20

T/F: the 5th pharyngeal arch arteries rarely form, and will completely degenerate if formed

true

21

what are the derivatives of the RIGHT SIDE 6th pharyngeal arch arteries?

Proximal portion forms proximal right pulmonary artery

distal degenerates

22

what are the derivatives of the LEFT SIDE 6th pharyngeal arch arteries?

Proximal portion forms proximal left pulmonary artery

distal portion forms the ductus arteriosus

23

the ductus arteriosus closes after birth and remains as the ____________________

closes after birth as ligamentum arteriosum

24

the recurrent laryngeal nerve hooks under the _________ arteries

6th pharyngeal arch

these nerves are dragged caudally during development

25

after development, the Left recurrent laryngeal n. hooks under ________ ________

ligamentum arteriosum (the remnant of the left 6th pharyngeal arch artery)

26

T/F: the right recurrent laryngeal nerve will hook under the right subclavian artery

true

27

the aortic sac will form the proximal portion of which 2 structures?

aortic arch and the brachiocephalic trunk

28

the pulmonary trunk & ascending aorta are both derived from the:

Truncus arteriosis

29

the left side of the dorsal aorta will eventually form what?

the rest of aortic arch distal to left subclavian artery

30

what are the adult derivatives of the vitelline arterial plexus?

Celiac trunk, SMA, IMA

31

which vessel carries deoxygenated blood from the fetus to the placenta?

umbilical artery

(remember- arteries go away from the heart)

32

Each umbilical artery arises from the caudal ______ ______

dorsal aorta

33

after birth, what will the proximal end of the umbilical arteries form?

- Internal iliac arteries
- internal vesical arteries

34

at birth, the Foramen ovale closes off as the _____ ______ and the ductus arteriosis closes off as the ______ ______

fossa ovalis


ligamentum arteriosum

35

what structure will the left umbilical vein become after birth?

ligamentum Teres hepatis- round ligament of liver

36

the ____________ will close off at birth to form the medial umbilical ligaments

distal umbilical arteries

37

what vein will ultimately form the hepatic portion of the inferior vena cava?

right vitelline vein

38

Right and left vitelline veins caudal to liver will form what?

the hepatic portal system

39

the left vitelline vein will do what?

degenerates between heart and liver