Flashcards in Embryo- Development of the Great Vessels - Leah Hunter Deck (35):
Know the difference between Prenatal and Postnatal Circulation....Draw it.
______ & ______ form the common cardinal Vein.
Ant. and Post. cardinal vein form the common cardinal vein.
What 3 veins drain into the Sinus venous?
1. Common cardinal V.
2. Vitelline V.
3. Umbilical V.
What is the function of the Vitelline V.?
Returns poorly oxygenate blood from umbilical vesicle (Yolk Sac)
What is the function of the Umbilical V.?
Carry well oxygenates blood from chronic sac.
What is the function of the Common cardinal vein?
Return oxygen poor blood from body. (Drains poorly oxygenated blood from embryo)
When does the shunt between the two anterior cardinal vv, form the left brachiocephalic V?
______ formed by right anterior cardinal and common cardinal V.
SVC (superior Vena cava)
What has to happen first for the formation of the Ductus Venosus?
Right umbilical vein fully degenerates.
What forms Ductus Venosus?
Left umbilical vein
- part between heart and liver degenerates.
* Only vessel carrying oxygenated blood to embryonic heart.
What forms the hepatic portal system?
Right & left Vitelline veins caudal to the liver form the hepatic portal system.
What is the IVC made of?
4 segments of 4 different veins
How is the coronary sinus formed?
Left sinus venosus horn forms the coronary sinus
_______ is incorporated into the primordial right atrium to form sinus venarum (smooth area)
Right sinus venosus horn
How do pulmonary veins form?
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.
___________ froms bulbar ridges, like the truncal ridges in trunks arterious.
Bulbar ridges & Truncal ridges are derived from what?
Neural crest mesenchyme
______ & ____ divide into the ascending aorta and pulmonary trunk.
What is the common cause of cyanotic heart disease?
Transposition of the great vessels.
What causes Tetralogy of Fallot?
unequal division of trunks arteriosus.
What does Tetralogy of Fallot cause?(4)
1. pulmonary artery stenosis (Obstruction of right ventricle outflow)
2. Ventricular septal defect
3. Dextropostion of aorta
4. Right ventricular hypertrophy
Describe the formation of the coronary arteries...
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.)
______ form the maxillary and external carotid.
1st pharyngeal arch aa
______ forms the stapedial aa.
2nd pharyngeal arch aa
_______ form common carotid aa and the proximal portion of the internal carotid aa.
3rd pharyngeal arch aa
What are the 4th pharyngeal arch arteries?
Left artery = arch of aorta between left common carotid and left subclavian.
Right artery = proximal part of the right subclavian.
What makes up the arch of the Aorta?
Tuncus arteriosus, aortic sac, 4th pharyngeal arch a., and left dorsal aorta.
What are the 6th pharyngeal arch arteries?
Left prox = prox left pumonary artery.
Right Prox = pro right pulmonary A.
Left Distal - ductus arteriosus
Right distal = dengernates
____ are involved in the formation of pulmonary arteries.
The 6th pharyngeal arch arteries.
____ cause the recurrent laryngeal nerve to differ on each side of the body.
Sixth part of pharyngeal aa.
What forms the common iliac aa and lateral sacral aa?
- 30 or more branches in body
-5th pair becomes iliac aa.
become lateral sacral A. on sacral region.
_________ goes into the primordial gut and persist as the celiac truck, SMA and IMA.
What forms the internal iliac aa and the superior vesical aa.?
Proximal portion of the umbilical aa.
Thoracic duct si formed by what 2 structures?
Caudal right lymphatic duct + anastomosis of left & right cranial thoracic ducts.