pack Flashcards
What will happen to the right horn?
Disappear inside the sinus venosus
(Bc you are on the right, so you are not going to use the horn to fight, you are going to throw it in the drain)
What will the right anterior cardinal vein form?
It will form the SVC
(when u r right and anterior you will be superior)
What will the right posterior cardinal vein form?
IVC
(bc when you are right you are still major, but you are inferior to the one who is anterior)
EXTREMELY IMPORTANT: What happens to the left horn (left common cardinal vein)?
form the coronary sinus
(left, so oxygen so cornary, sinus bc you put the horn in the sinus)
What will happen to the left anterior & posterior cardinal veins?
degenerate
(bc the left people will suffer, and they are only left, not common, so no good in them)
What will happen if the left anterior cardinal vein persists? What will it open to?
it will form a left SVC
open to: coronary sinus
What will happen to the Right umblical vein?
degenerate
(bc it doesn’t reroute oxygen)
What will happen to the The left umbilical vein? What will it form?
will persist and form ligamentum teres after birth
What will the right and left vitelline vein form?
Join togther to form the Portal vein (bc when you take Vitamins you feel like you are in another world)
Where does the left atrium come from?
expansion of pulmonary vein
(bc it brings back the oxygenated blood)
Where does the Sternocoastal surface come from
right ventricle (bulbus cordis)
Will the veins that go to the sinus venosus attach to the liver?
Yes
(Remember that they get rerouted)
How will the hepatic portal vein deliver blood to the heart?
Attaches to the liver, then blood goes to IVC, then heart.
What are the two structures that form the atrial septum?
The septum primum and the septum secondum
What is the opening between the septum primum and the septum secondum
Foramen ovale
What is the reason for closure of foramen ovale?
The pressure in the left atrium would increase immediately after the birth bc of the use of lungs for the first time. This will cause the septum primum to hit against the septum secondum.
Where do AV valves orignate from?
Endocardial cushions (bc it is inside the heart, and the valves must be cushioned, av valves bc it is in the interventricular septum)
What does the truncus arteriosus form?
Aorta and pulmonary trunk
(bc it is an artery, and trunk like the aortic trunk and like the pulmonary trunk)
What will seperate the aorta and the pulmonary artery?
aorticopulmonary septum
What is the aorticopulmonary septum continous with?
membranous part of the Interventicular septum
(makes sense bc the pulmonary artery and the aorta both attach to the ventricles)
To what side will the pulmonary artery and the aorta move? (left or right) Why?
Left: Pulmonary artery
Right: aorta
Because: of the aorticopulmonary septum twisting
(remember that the heart is kind of مايل )
What type of cells is the aorticopulmonary septum dependent on?
Neural crest cells
(bc their valves are called semilunar and semilunar is crest)
What is the cause of Tetraolgy of fallot?
Defect in neural crest cells in the aorticopulmonary septum
EXTREMELY IMPORTANT: What are the problems of tetralogy of fallot?
Ventricular septal defect
Right ventricular hypertrophy (blood will flow from the LV to RV, bc of the ventricular septal defect so the size of the rv will increase) (boot shaped heart)
Overriding of the aorta (aorta will be huge bc the AP septum will be shifted to the right)
Pulmonary artery stenosis (AP septum will be shifted towards the right so the P will be blocked)
How will the septum primum form intially?
It will go down from the top, and then when it reaches the bottom, it will degenrate from the top.
EXTERMELY IMPORTANT: What type of cells does the aorticopulmonary septum form from?
Neural crest cells
