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Cardiac embryology (Foetal Heart (In utero (Pulmonary system not…
Cardiac embryology
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Atrial development
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Septum primum comes down top, leaves hole for communication
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Fibrous tissue develops, for annulus fibrosis
Ventricular development
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Bulbus cordis and foetal ventricle, groove on outside between bulbs -> primordial ventricular septum
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Veins
Vitelline, umbilical, cardinal
Yolk sac receds, vitelline stay
Amalgamated into liver, drain gut, cranial part of caudal vena cava and hepatic portal vein
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Arteries
Aortic arches
6 pairs, need to remember 3,4,6
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Recurrent laryngeal branches of vagus nerve pass caudal to 6th aortic arch. Drawn caudally when heart moves caudally into thorax so aortic arches influence this position
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