L48 Embryo Great Vessels

Question 1

Week 5m

Answer 1

Right superior truncus swelling
Left superior truncus swelling
RIght dorsal conus swelling
Left ventral conus swelling

Question 2

Right superior truncus swelling grows

Answer 2

Distally and to the left

Question 3

Left inferior truncus swelling grows

Answer 3

Distally and to the right

Question 4

Truncus swellings twist around each other to form

Answer 4

aorticopulmonary septum

Question 5

aortic arch arteries arise from

Answer 5

aortic sac

Question 6

aortic arch arteries terminate in

Answer 6

right and left dorsal aortae

Question 7

aortic sac will form (2)

Answer 7

Brachiocephalic a. (trunk)

Proximal aortic arch

Question 8

First arch forms

Answer 8

Disappears but small portion forms maxillary artery

Question 9

Second arch forms

Answer 9

Disappears but small portion forms
Hyoid artery
Stapedial artery

Question 10

Third arch forms

Answer 10

Common carotid a
First part of Internal carotid a
External carotid a

Question 11

Fourth arch forms

Answer 11

Left: part of aortic arch between left common carotid and left subclavian aa
Right: proximal segment of right subclavian

Question 12

Pulmonary arch

Answer 12

Sixth arch

Question 13

Sixth arch forms

Answer 13

Right: proximal right pulmonary a.
Left:
-Ductus arteriosus
-Left pumonary

Question 14

Great vessels are derived from

Answer 14

Epicardium

Question 15

Great vessel connections to aorta are formed by

Answer 15

ingrowth of arterial endothelial cells

Question 16

Intersegmental arteries pass between and carry blood to

Answer 16

somites and their derivatives

Question 17

Intersegmentsal arteries of neck

Answer 17

vertebral arteries

Question 18

Intersegmental arteries of thorax

Answer 18

intercostal arteries

Question 19

Intersegmental arteries of abdomen

Answer 19

lumbar arteries

Question 20

Fifth pair of intersegmental arteries in abdomen

Answer 20

common iliac

Question 21

Intersegmental arteries in sacral region

Answer 21

Lateral sacral arteries

Question 22

Vitelline aa develop into

Answer 22

Celiac trunk

Superior mesenteric a.

Question 23

Umbilical aa develop into

Answer 23

Inferior mesenteric

Secondary connection: Common iliac

Question 24

Umbilical artery after birth

Answer 24

Proximal:
-Internal iliac
-superior vesical
Distal:
-median umbilical ligements (obliterated)

Question 25

Week 5 major veins

Answer 25

Vitelline Umbilical Cardinal

Question 26

Vitelline veins function

Answer 26

blood from yolk sac to sinus venosus

Question 27

Umbilical veins function

Answer 27

Oxygenated blood from mother to embryo

Question 28

Cardinal veins function

Answer 28

Draining embryo

Question 29

Week 4

Answer 29

Vitelline vv forms plexus around duodenum | Hepatic sinusoids

Question 30

Portal vein formed by

Answer 30

network around duodenum

Question 31

Superior mesenteric vein derived drom

Answer 31

vitelline vein

Question 32

Rechanneling of blood from left sinus horn reduction Thru Forms

Answer 32

Hepatocardiac channel | Forms hepatocardiac portion of inferior vena cava

Question 33

Caries blood from placenta to liver

Answer 33

Left umbilical vein

Question 34

Ductus venosus purpose

Answer 34

bypass sinusoidal plexus of liver

Question 35

Left umbilical vein will become

Answer 35

Ligamentum teres hepatis

Question 36

Ductus venosus becomes

Answer 36

ligamentum venosum

Question 37

Anterior cartdinal veins drain

Answer 37

Drain cephalic part of embryo

Question 38

Posterior Cardinal veins drain

Answer 38

Drain rest of embryo (not cephalic part)

Question 39

Weeks 5-7 veins

Answer 39

Subcardinal veins kidneys Sacrocardinal veins lower extremities Supracardinal veins body wall

Question 40

Anterior cardinal vein forms

Answer 40

Left brachiocephalic vein Superior vena cava (also from prox. R. common cardinal) Internal jugular vein

Question 41

Subcardinal vein forms

Answer 41

Left renal vein | Renal segment of Inferior vena cava

Question 42

Sacrocardinal vein forms

Answer 42

Left common iliac | Sacrocardinal segment of inferior vena cava

Question 43

Supracardinal vein and posterior cardinal vein forms

Answer 43

azygos vein | hemiazygos vein

Question 44

Thoracic duct from

Answer 44

Caudal right lymphatic duct | Left and right cranial thoracid ducts

Question 45

Right lymphatic duct from

Answer 45

cranial right thoracic duct