Embryo- Development of the Great Vessels - Leah Hunter

Question 1

Know the difference between Prenatal and Postnatal Circulation….Draw it.

Answer 1

Great Job!

Question 2

______ & ______ form the common cardinal Vein.

Answer 2

Ant. and Post. cardinal vein form the common cardinal vein.

Question 3

What 3 veins drain into the Sinus venous?

Answer 3

1. Common cardinal V.
2. Vitelline V.
3. Umbilical V.

Question 4

What is the function of the Vitelline V.?

Answer 4

Returns poorly oxygenate blood from umbilical vesicle (Yolk Sac)

Question 5

What is the function of the Umbilical V.?

Answer 5

Carry well oxygenates blood from chronic sac.

Question 6

What is the function of the Common cardinal vein?

Answer 6

Return oxygen poor blood from body. (Drains poorly oxygenated blood from embryo)

Question 7

When does the shunt between the two anterior cardinal vv, form the left brachiocephalic V?

Answer 7

Week 8

Question 8

______ formed by right anterior cardinal and common cardinal V.

Answer 8

SVC (superior Vena cava)

Question 9

What has to happen first for the formation of the Ductus Venosus?

Answer 9

Right umbilical vein fully degenerates.

Question 10

What forms Ductus Venosus?

Answer 10

Left umbilical vein

• part between heart and liver degenerates.
• Only vessel carrying oxygenated blood to embryonic heart.

Question 11

What forms the hepatic portal system?

Answer 11

Right & left Vitelline veins caudal to the liver form the hepatic portal system.

Question 12

What is the IVC made of?

Answer 12

4 segments of 4 different veins

Question 13

How is the coronary sinus formed?

Answer 13

Left sinus venosus horn forms the coronary sinus

Question 14

_______ is incorporated into the primordial right atrium to form sinus venarum (smooth area)

Answer 14

Right sinus venosus horn

Question 15

How do pulmonary veins form?

Answer 15

Veins develop as outgrowth of the dorsal trail wall, just to the left of the septum premium…
As the atrium expands the primordial vein and its branches are incorporated into the wall of the left atrium, resulting in a mostly smooth wall.

Question 16

___________ froms bulbar ridges, like the truncal ridges in trunks arterious.

Answer 16

Bulbus cordis

Question 17

Bulbar ridges & Truncal ridges are derived from what?

Answer 17

Neural crest mesenchyme

Question 18

______ & ____ divide into the ascending aorta and pulmonary trunk.

Answer 18

Bulbus cordis

Truncus Arteriosus

Question 19

What is the common cause of cyanotic heart disease?

Answer 19

Transposition of the great vessels.

Question 20

What causes Tetralogy of Fallot?

Answer 20

unequal division of trunks arteriosus.

Question 21

What does Tetralogy of Fallot cause?(4)

Answer 21

1. pulmonary artery stenosis (Obstruction of right ventricle outflow)
2. Ventricular septal defect
3. Dextropostion of aorta
4. Right ventricular hypertrophy

Question 22

Describe the formation of the coronary arteries…

Answer 22

Formed as sports off sinus venous and epicardium.
* connection to aorta is formed by ingrowth of arterial endothelial cells. (this is hoe the coronary aa invade the aorta.)

Question 23

______ form the maxillary and external carotid.

Answer 23

1st pharyngeal arch aa

Question 24

______ forms the stapedial aa.

Answer 24

2nd pharyngeal arch aa

Question 25

_______ form common carotid aa and the proximal portion of the internal carotid aa.

Answer 25

3rd pharyngeal arch aa

Question 26

What are the 4th pharyngeal arch arteries?

Answer 26

Left artery = arch of aorta between left common carotid and left subclavian.
Right artery = proximal part of the right subclavian.

Question 27

What makes up the arch of the Aorta?

Answer 27

Tuncus arteriosus, aortic sac, 4th pharyngeal arch a., and left dorsal aorta.

Question 28

What are the 6th pharyngeal arch arteries?

Answer 28

Left prox = prox left pumonary artery.
Right Prox = pro right pulmonary A.
Left Distal - ductus arteriosus
Right distal = dengernates

Question 29

____ are involved in the formation of pulmonary arteries.

Answer 29

The 6th pharyngeal arch arteries.

Question 30

____ cause the recurrent laryngeal nerve to differ on each side of the body.

Answer 30

Sixth part of pharyngeal aa.

Question 31

What forms the common iliac aa and lateral sacral aa?

Answer 31

Intersegmental aa.
- 30 or more branches in body
-5th pair becomes iliac aa.
become lateral sacral A. on sacral region.

Question 32

_________ goes into the primordial gut and persist as the celiac truck, SMA and IMA.

Answer 32

Vitelline A.

Question 33

What forms the internal iliac aa and the superior vesical aa.?

Answer 33

Proximal portion of the umbilical aa.

Question 34

Thoracic duct si formed by what 2 structures?

Answer 34

Caudal right lymphatic duct + anastomosis of left & right cranial thoracic ducts.

Question 35

Right Lymphatic ducts are formed by what structure?

Answer 35

Cranial portion of the right thoracic duct.