Term
| _____ tubes fuse to form a single primitive heart tube |
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Definition
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Term
| early in development, you have _____ dorsal aorta |
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Definition
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Term
| early in development, blood is drained by the _______. |
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Definition
| anterior and posterior cardinal veins |
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Term
what three things compose the nutritional circuits?
what do each do? |
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Definition
vitelline- supplies and drains yolk sac
umilical placenta
umbilical vein- carries O2 from placenta |
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Term
****What does each become****
Truncus Arteriosus
bulbus cordis
primivtive ventricle
primitive atrium
sinus venosus |
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Definition
Truncus Arteriosus- aorta and pulmonary trunk
bulbus cordis- smooth part of right and left ventricles
primivtive ventricle- trabeculated part of right and left ventricles
primitive atrium- trabeculated part of the right and left atria
sinus venosus- smooth part of right atrium and coronary sinus |
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Term
| The site of apoptosis allows for? |
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Definition
| folding of the heart tube |
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Term
| What does the endocardial cushion do? |
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Definition
| mid point which is needed to divide the heart into its four chambers |
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Term
| The heart tube is characterized by what type of looping? |
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Definition
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Term
what are the five dilations that form the primitive heart tube?
which ones grow the fastest? |
|
Definition
truncus arteriosus
bulbus cordis
primitive ventricle
primivite atrium
sinus venosus
truncus arteriosus/bulbus cordis/primitive ventricles grow the fastest |
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Term
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Definition
when the heart bends to the right instead of the left
heart on right side
+
great vessels on right side |
|
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Term
| most common positional abnormality? |
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Definition
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Term
| Partition of the Truncus arteriosus will for the _____. |
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Definition
| aortic and semilunar valves |
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Term
| partion of the AV canal will form the ______ |
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Definition
| tricuspid and biscuspid valves |
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Term
| dorsal and ventral blocks of tissue grow together-endocardial cushions- to form _______ |
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Definition
| a right and left AV canal |
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Term
| Formation of what is the first critical step in forming a four chambered heart? |
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Definition
| formation and fushion of endocardial cushions |
|
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Term
| what is atrioventricular communis |
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Definition
| when the endcardial cushions fail to fuse properly |
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Term
What is a common AV canal?
what causes it? |
|
Definition
atrioventricular septal defect wherein there is communication between the two atria and ventricles, but none between the atria and ventricles
occurs by abnormal fushion of the endocardial cushions |
|
|
Term
| The interventricular septum is composed of a ________ and a _______, that divides ______. |
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Definition
muscular part
membranous part
that divides AV canals |
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Term
| Most common heart defect? |
|
Definition
ventricular septal defect
(dextrocardia is the most common positional defect) |
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Term
most VSDs occure in the ______ portion.
_____ defects are the more commonly correct surgically. |
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Definition
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Term
| Foramen primum forms between the free edge of the ______ and _____. It closes when the _____ fuses with the _____. The ____ forms in the center of the septum primum. The ______ forms to the right of the septum primum. The ______ is the opening between the upper and lower limbs of the septum secundum |
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Definition
| Foramen primum forms between the free edge of the septum primum and AV cushions. It closes when the septum primum fuses with the AV cushions. The foramen secundum forms in the center of the septum primum. The septum secundum forms to the right of the septum primum. The forman ovale is the opening between the upper and lower limbs of the septum secundum |
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Term
The fossa ovale was the _____
and
the limbus was the _____ |
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Definition
septum primum
septum secundum |
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Term
| incomplete fusion of the endocardial cushions is ususally associated with which type of atrial septal defect? |
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Definition
| primum type atrial septal defect |
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Term
| vitelline veins are incorporated with the _____. |
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Definition
|
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Term
| liver develops in septum ______ |
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Definition
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|
Term
| ductus venosus becomes the |
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Definition
|
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Term
| umilical vein becomes the _____ |
|
Definition
|
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Term
| what is the role of the ductus venosus? |
|
Definition
connects the umbillical vein with the IVC
and allows the blood to bypass the liver |
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Term
common cardinal vein goes away and becomes part of the ______.
The anterior cardinal vein makes the __________ and becomes connected to the SVC. |
|
Definition
IVC
brachiocephallic vein |
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Term
| if she asks someting about a L to R shunt, the answer is probably going to be that the right atrium thickens and pushes blood up through the coronary arteries and makes them thicker |
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Definition
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Term
| Neural Crest migration problems leads to ________ formation problems |
|
Definition
|
|
Term
| because partitioning the great vessels is harder to do, there is _________ |
|
Definition
| more of a chance that something will go wrong |
|
|
Term
| what happens during eisenmenger's syndrome? |
|
Definition
| VSD wherin there is an initial L to R shunt thereby increasing pulmonary blood flow which then causes a R to L shunt and cyanosis |
|
|
Term
****what are the four cardinal happenings of tetralogy of fallout?*****
|
|
Definition
PROVE!
pulmonary stenosis
right ventricular hypertrophy
overriding aorta
VSD
|
|
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Term
****what do the aortic arches develop into?****
IV-
V-
VI-
|
|
Definition
VI- Left develops into aortic arch
Right-develops into subclavian
V- dissappears
VI- proximal- Right and left pulmonary arteries
Distal- ductus arteriosus |
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Term
| Ductus arteriosus becomes _____. |
|
Definition
|
|
Term
PDA
patent ductus arteriosus |
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Definition
| when the ductus arteriosus doesn't close so there is communication between the pulmonary artery and the aorta |
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Term
****What do they become?****
vitelline vessels
allantoic vessels |
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Definition
vitelline vessels- celiac, superior and inferior mesenteric arteries
allantoic vessels- umbillical arteries
both of these give rise to arteries in the gut |
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Term
Right aortic arch-
what causes it
what is associated with it |
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Definition
4th arch right of subclavian persists
situs inversus |
|
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Term
| how does double aortic arch form? |
|
Definition
segment of the right 4th aortic arch caudal to subclavian stays around
can constrict the esophagus and trachia |
|
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Term
What is coarctation of the aorta...
what is it characterized by? |
|
Definition
narrowing of aorta
causes blood to go through internal thoracic artery, anterior and posterior intercostal arteries and back down descending aorta.
the intercostal arteries expand and cause bone resorption that you would see on xray |
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