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Anatomy > 5 Development of Great Vessels > Flashcards

5 Development of Great Vessels Flashcards

1
Q

Role of vitelline vv.

A

deoxygenated blood from yolk sac –> sinus venosus

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2
Q

Role of umbilical vv.

A

oxygenated blood from placenta –> sinus venosus

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3
Q

Role of cardinal vv.

A

deoxygenated blood from body of embryo –> sinus venosus anterior = superior to heart posterior = inferior to heart

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4
Q

right anterior cardinal vein…

A

R brachiocephalic v. superior vena cava

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5
Q

left anterior cardinal vein…

A

L brachiocephalic

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6
Q

posterior cardinal vein…

A

root of azygos v. common iliac vv.

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7
Q

R umbilical vein…

A

degenerates

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8
Q

L umbilical vein…

A

umbilical v. ductus venosus (embryo) ligamentum venosum (adult)

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9
Q

Role of ductus venosus

A

Venous shunt between L umbilical vein and IVC. Takes oxygenated blood right to heart, bypassing sinusoidal capillaries of liver.

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10
Q

R vitelline v.

A

IVC (hepatic portion, heart –> caudal edge of liver) Contributes to hepatic portal system.

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11
Q

L vitelline v.

A

Contributes to hepatic portal system.

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12
Q

R horn of sinus venous…

A

Larger. Sinus venarum of R atrium (smooth)

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13
Q

L horn of sinus venous…

A

Smaller. Coronary sinus (drains into R atrium).

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14
Q

Dorsal aortae

A

Unfused in region of pharyngeal arches. Fused distally –> descending aorta.

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15
Q

1st pharyngeal arch aa.

A

Largely degenerate. Maxillary aa.

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16
Q

2nd pharyngeal arch aa.

A

Largely degenerate. Stapedial aa.

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17
Q

3rd pharyngeal arch aa.

A

Common carotid aa. Proximal internal carotid aa.

18
Q

L 4th pharyngeal arch aa.

A

Middle portion of aortic arch (L CC –> L subclav)

19
Q

R 4th pharyngeal arch aa.

A

Proximal R subclavian a. *R recurrent laryngeal n.

20
Q

5th pharyngeal arch aa.

A

Degenerates on both sides

21
Q

L 6th pharyngeal arch aa. - proximal

A

Proximal left pulmonary aa.

22
Q

L 6th pharyngeal arch aa. - distal

A

Ductus arteriosus (closes after birth as ligamentum arteriosum) * L recurrent laryngeal

23
Q

R 6th pharyngeal arch aa. - proximal

A

Proximal right pulmonary aa.

24
Q

R 6th pharyngeal arch aa. - distal

A

Degenerates

25
Q

Recurrent laryngeal nerves.

A

Associated with 6th pharyngeal arch aa. R: hooks behind R subclavian aa. L: hooks under ligamentum arteriosum.

26
Q

Aortic sac…

A

Proximal portion of aortic arch Brachiocephalic trunk

27
Q

Truncus arteriosus…

A

Ascending aorta Pulmonary trunk

28
Q

R unfused portions of dorsal aortae

A

mostly regress

29
Q

L unfused portions of dorsal aortae

A

forms rest of aortic arch, distal to L subclavian a.

30
Q

3 contributors to aortic arch

A

proximal: aortic sac middle: L 4th arch distal: L unfused dorsal aortae

31
Q

vitelline arterial plexus…

A

celiac trunk, SMA, IMA

32
Q

umbilical aa carry…

A

deoxygenated blood from embryo –> placenta

33
Q

umbilical vv carry…

A

oxygenated blood from placenta –> sinus venosus of embryonic heart

34
Q

umbilical aa…

A

proximal aa: internal iliac aa, superior vesical aa, distal aa: medial umbilical ligament

35
Q

Source of O2 before/after birth

A

Before birth: O2 from placenta After birth: O2 from lungs

36
Q

At birth, placental circulation closes off. Ductus venosus… Umbilical vv… Distal umbilical aa…

A

DV –> ligamentum venosum UV –> ligamentum teres hepatis DUA –> medial umbilical ligaments

37
Q

At birth, increased pulmonary circulation… 1st BP

A

Inc. BP in L atrium (receiving oxygenated blood from lungs)

38
Q

At birth, increased pulmonary circulation… 2nd foramen ovale…

A

foramen ovale closes off as fossa ovalis (no flow b/w atria)

39
Q

At birth, increased pulmonary circulation… 3rd ductus arteriosus…

A

ligamentum arteriosum (no blood flow from pulmonary trunk to aortic arch)

40
Q

Which vessels are responsible for carrying deoxygenated blood from the body of the embryo into the sinus venosus?

A

cardinal vv.

41
Q

ID upper and lower arrow.

A

upper: ductus venosus
lower: left umbilical vein

42
Q

ID structure

A

medial umbilical ligaments. These structures are the closed off remnants of the distal portions of the paired umbilical aa.

Anatomy (7 decks)

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