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SP14 Anatomy > Final Embryo - Great Vessel Development > Flashcards

Final Embryo - Great Vessel Development Flashcards

1
Q

What are the major pairs of veins draining into the sinus venosus

A

anterior and posterior cardinal creating the common cardinal
umbilical
vitelline

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2
Q

Which veins drain deoxygenated blood from yolk sac

A

vitelline

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3
Q

Which veins drain oxygenated blood from placenta

A

umbilical

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4
Q

Which veins drain deoxygenated blood from body of embryo

A

cardinal veins

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5
Q

Which cardinal vein drains the region superior to the heart

A

anterior cardinal

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6
Q

Which cardinal vein drains the region inferior to the heart

A

posterior cardinal

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7
Q

The left anterior cardinal vein develops an anastomosis with what

A

right anterior cardinal vein

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8
Q

The caudal portion of the left anterior cardinal vein degenerates becoming the what

A

left brachiocephalic vein

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9
Q

The right anterior cardinal vein becomes what

A

right brachiocephalic and superior vena cava

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10
Q

What do the posterior cardinal veins become

A

root of azygos vein and common iliac veins

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11
Q

What becomes of the right umbilical vein

A

it degenerates completely

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12
Q

What becomes of the left umbilical vein

A

it forms the ductus venosus

ligamentum venosum in adults

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13
Q

What is the ductus venosus

A

it is a venous shunt between the left umbilical vein and IVC

after week 7

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14
Q

What is the purpose of the ductus venosus

A

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

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15
Q

What becomes of the left umbilical vein between the heart and liver

A

it degenerates

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16
Q

What is the left umbilical vein carrying

A

it is the only vessel carrying oxygenated blood to the embryonic heart

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17
Q

The right vitelline vein forms what

A

hepatic portion of IVC

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18
Q

What becomes of the left vitelline vein

A

it degenerates between the heart and liver

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19
Q

What do the right and left vitelline veins caudal to the liver form

A

the hepatic portal system

20
Q

The dorsal aorta remain unfused where

A

in the region of the pharyngeal arches and distal to that it has fused to form the descending portion

21
Q

How do pharyngeal arch artery pairs develop

A

craniocaudally with the pharyngeal arches

22
Q

This arch artery never forms or is rudimentary and degenerates

A

5th arch

23
Q

This pharyngeal arch largely degenerates and the remaining portion becomes the maxillary artery

A

1st pharyngeal arch

24
Q

This pharyngeal arch largely degenerates but remaining portions become the stapedial artery

A

2nd pharyngeal arch

25
Q

This pharyngeal arch becomes the common carotid and the proximal portions of the internal carotid

A

3rd pharyngeal arch

26
Q

The right side of this pharyngeal arch becomes the

A

4th pharyngeal arch

forms proximal right subclavian artery

27
Q

The left side of this pharyngeal arch forms

A

4th pharyngeal arch

forms aortic arch segment from left common carotid artery to left subclavian artery

28
Q

The right proximal portion of this pharyngeal arch forms

A

6th pharyngeal arch

proximal right pulmonary artery

29
Q

The left proximal portion of this pharyngeal arch forms

A

6th pharyngeal arch

proximal left pulmonary artery

30
Q

The left distal portion of this pharyngeal arch forms

A 
6th pharyngeal arch
ductus arteriosus (ligamentum arteriosum)
31
Q

This nerve hooks under the 6th pharyngeal arch and elongates as its dragged caudally due to heart repositioning

A

recurrent laryngeal nerve

32
Q

The right recurrent laryngeal nerve hooks behind what

A

right subclavian artery

33
Q

The left recurrent laryngeal nerve hooks under what

A

ligamentum arteriosum

34
Q

This forms the proximal portion of the aortic arch and the brachiocephalic trunk

A

aortic sac

35
Q

This forms the ascending aorta and the pulmonary trunk

A

truncus arteriosus

36
Q

The unfused portions on the left side of the dorsal aorta form what

A

rest of aortic arch distal to left subclavian artery

37
Q

The vitelline arterial plexus form what

A

celiac trunk
SMA
IMA

38
Q

The umbilical artery carries what

A

deoxygenated blood from embryo to placenta

39
Q

The umbilical vein carries what

A

oxygenated blood from placenta to sinus venosus of embryonic heart

40
Q

Each umbilical artery arises from what

A

from caudal dorsal aorta (site of future common iliac artery) and courses through connecting stalk to placenta

41
Q

What does the umbilical artery form in adults

A 
internal iliac (proximal)
superior vesical (proximal)
medial umbilical ligament (distal)
42
Q

Where does the oxygen supply come before and after birth

A

before; from placenta

after; from lungs

43
Q

What does the foramen ovale become after birth

A

fossa ovalis

44
Q

What does the ductus arterioles become after birth

A

ligamentum arteriosum

45
Q

What does the ductus venosus become after birth

A

ligamentum venosum

46
Q

What does the umbilical vein become after birth

A

ligamentum teres hepatic

47
Q

What does the distal umbilical artery become after birth

A

medial umbilical ligaments

SP14 Anatomy (33 decks)

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