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Embryology Term 1 > Vessel Development > Flashcards

Vessel Development Flashcards

1
Q

What do the paired dorsal aortae become caudally?

A

they fuse into one aorta

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2
Q

What does the right horn of the truncus arteriousis become?

A

Brachiocephalic artery

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3
Q

What does the left horn of the truncus arteriosus become?

A

Proximal Aortic arch

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4
Q

Is there a 5th branch of the aortic arch?

A

NO

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5
Q

What happens to the 1st aortic arch?

A
  • mostly disappears

- small portion becomes maxillary artery

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6
Q

What happens to 2nd Aortic arch?

A
  • Mostly disappears

- Small portions form Hyoid & stapedial arteries

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7
Q

Which arches are the most important?

A

3, 4, 6

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8
Q

What do the 3rd aortic arches become?

A

-common and proximal internal carotid arteries

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9
Q

Where does the distal internal carotid arise from?

A

dorsal aorta

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10
Q

Where do the external carotid arteries come from?

A

branch from internal carotid

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11
Q

What does the left 4th aortic arch form?

A

part of the arch of the aorta between carotid and subclavian arteries

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12
Q

What does the right 4th aortic arch form?

A

most proximal portion of right subclavian artery

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13
Q

What forms the right subclaian artery?

A
  • Right fourth arch
  • Short segment of right dorsal aorta
  • Right 7th intersegmental artery
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14
Q

What forms the left subclavian artery?

A

left seventh intersegmental artery

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15
Q

What do the 6th aortic arches become?

A

Pulmonary trunk

Right: Proximal right pulmonary artery

Left: Ductus arteriosus/ligamentum arteriosum

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16
Q

What are the three lateral branches of the abdominal aorta?

A
  • Supraneal
  • Gonadal
  • Renal
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17
Q

What is the contraction of the muscular walls that closes the ductus arteriousus mediated by?

A

Bradykinin

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18
Q

What are the 3 pairs of veins that the sinus venosus receives blood from in development? (4wks)

A
  • Vitelline
  • Umbilical
  • Common Cardinal
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19
Q

Where do the vitelline veins carry blood from?

A

-from yolk sac to sinus venosus

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20
Q

where do the umbilical veins carry blood from?

A

-placenta to sinus venosus

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21
Q

Where do the cardinal veins carry blood from?

A

-from head and body of embryo to sinus venosus

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22
Q

From where does the vitelline vein arise?

A

-capillary plexus of yolk sac

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23
Q

What is the septum transversum?

A

-divides the embryonic coelomic cavity into thorax and abdominal cavities

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24
Q

What are hepatic sinusoids?

A

-An extensive vascular network that passes through the developing liver

25
What forms the hepatic sinusoids?
-the left & right vitelline veins
26
Which vitelline vein disappears?
-left
27
What is the right hepatocardiac channel?
-the channel that carries blood from where the left vitelline vein used to be to the right vitelline vein, enlarging it
28
What becomes the portal vein?
-A portion of the right vitelline vein
29
What are the major derivatives of the vitelline veins
- hepatic sinusoids - portal vein/superior mesenteric vein - terminal IVC
30
Which umbilical vein disappears?
-RIGHT
31
What does the ductus venosus connect?
-left umbilical vein & right hepatocardiac channel
32
What are the major derivatives of the umbilical vein?
-ligamentum teres
33
What area of the body do the anterior cardinal veins drain?
-head
34
What area of the body do the posterior cardinal veins drain?
-rest of body (besides head)
35
What becomes the internal jugular veins?
-distal portion of both anterior cardinal veins
36
What becomes the coronary sinus?
-left anterior cardinal vein
37
What becomes the brachiocephalic vein?
-Anastamosis between the anterior cardinal veins
38
What does the brachiocephalic vein connect?
-The left juggular vein to the right anterior cardinal vein
39
What happens if the left anterior cardinal vein doesn't obliterate?
-you get a left SVC
40
What happens if the left anterior cardinal vein doesn't obliterate AND there is no left brachiocephalic vein?
-Double SVC's
41
What does the SVC derive from?
- Right common cardinal vein | - proximal right anterior cardinal vein
42
What replaces the posterior cardinal veins?
-Supracardinal & subcardinal veins
43
What does the supracardinal vein drain?
-Body wall
44
What does the subcardinal vein drain?
-kidney and gonads
45
What forms the IVC below the kidneys?
- Left supracardinal vein in abdomen obliterates | - Right supracardinal vein anastamoses with right subcardinal vein to form IVC
46
What does the left gonadal vein drain into?
-Left renal vein
47
What does the right gonadal vein drain into?
-IVC
48
What happens if the left supracardinal vein fails to involute below the renal collar?
-double IVC
49
What happens to the left supracardinal vein in the chest?
- it stays patent | - empties into SVC
50
What becomes the azygous vein?
-Right supracardinal vein above renal collar
51
What do the azygous veins do?
-form an alternate drainage of the body to the heart
52
What happens to the left subcardinal vein?
-it regresses
53
What happens to the right subcardinal vein?
-becomes IVC between liver & kidney
54
What happens if the right subcardinal vein fails to connect to the liver?
-Absent IVC between liver & kidney
55
What happens to the most caudal portion of the subcardinal veins?
-Becomes common iliac veins & most caudal portion of IVC
56
What does the lymphatic system develop from?
-Splanchnopleuric mesoderm
57
What forms the final aortic arch?
- Truncus - Left 4th aortic arch - left dorsal aorta
58
what are the vitelline arteries?
- initially paired arteries that supply the yolk sac | - fuse and form the arteries in dorsal mesentery of the gut

Embryology Term 1 (4 decks)

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