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30 Cards in this Set
- Front
- Back
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What does the truncus arteriosus (TA) give rise to? |
ascending aorta and pulmonary trunk |
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What does the bulbus cordis give rise to? |
smooth parts (outflow tract) of left and right ventricles |
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What does the primitive atria give rise to? |
trabeculated part of left and right atria |
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What does the primitive ventricle give rise to? |
trabeculated part of left and right ventricles |
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What does the primitive pulmonary vein give rise to? |
smooth part of left atrium |
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What does the left horn of sinus venosus (SV) give rise to? |
coronary sinus |
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What does the right horn of SV give rise to? |
smooth part of right atrium |
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What do the right common cardinal vein and right anterior cardinal vein give rise to? |
Superior vena cava |
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When does development of the heart begin? |
day 18 |
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When is development of the heart mostly complete? |
day 63 |
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What tissues make up the first heart field? |
endothelial precursor cell (EPC) clusters arranged in a horseshoe-shape w/in a cardiogenic area of intraembryonic splanchnic mesoderm |
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What do the EPCs form when they differentiate into endothelial cells? |
two primitive endocardial tubes |
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Where does inflow of blood into the primitive heart come from (3 pairs of vessels)? |
right and left common cardinal veins, vitelline veins, and umbilical veins |
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What does the primary heart tube wall consist of? |
endocardium, myocardium, and cardiac jelly |
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Where does the sinus venosus (the confluens of the right and left sinus horns) collect blood from? |
umbilical, vitelline, and common cardinal veins |
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Where does the primitive atrium receive blood from? |
sinus venosus |
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Where is the outflow tract? |
portion b/w primitive ventricle and aortic sac |
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What does the outflow tract form? |
most of the right ventricle, conus arteriosus, and truncus arteriosus |
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What is the aortic sac (root)? |
confluens of aortic arch blood vessels |
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When does the heart muscle begin contracting? |
day 22 |
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When does blood start flowing? |
day 24 |
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What does the dorsal mesocardium eventually form, after rupturing? |
transverse sinus |
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What does the right vitelline vein become? |
inferior vena cava |
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What forms the SA node? |
a part of the right sinus horn or right common cardinal vein |
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When do the major events of partitioning into four chambers occur? |
b/w 28-37 days |
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What type of growth is the do the muscular interventricular and atrial septa exhibit? |
differential growth |
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Where do we find endocardial cushion tissue? |
forming the atrioventricular septum, contributing to the atrial and ventricular septa, conotruncus |
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What fills the conotruncal ridges? |
mesenchyme from the endocardium and migrating neural crest cells, cushion tissue |
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Which aortic arch connects the right ventricle w/ the lungs? |
VI |
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Which aortic arches connect the left ventricle to the rest of the body? |
III & IV |
