Term
6 Aortic arches and fate: |
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Definition
Aortic arches arise from aortic sac. I: Small portion becomes maxillary artery. II: Forms hyoid and stapedial arteries. III: Forms common carotid artery and first part of internal carotid artery. IV: On the left it forms part of the arch of aorta, on the right forms the most proximal segment of subclavian artery. V: nothing VI: known as pulmonary arch. Right side becomes part of pulmonary artery. Left side becomes the ductus arteriosus(extension of pulmonary artery. |
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Term
| What are the 3 pairs of veins that develop into our venous system? |
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Definition
Vitelline vein Umbilical vein Common Cardinal vein
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Definition
Forms Hepatic Sinusoids(discontinuous capillaries) Forms hepatocardiac portion of the inferior vena cava. Forms Portal vein. Forms Superior mesenteric vein.
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Term
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Definition
connection between fetus and mother. oxygenated blood goes from mother to fetus. Forms Ductus Venosus:shunts blood from umbilical vein to inferior vena cava. This allows oxygenated blood from the placenta to bypass liver. Destroyed after birth and forms ligamentum teres hepatis (one of the round ligaments of the liver) and the ligamentum venosum (similiar to other one)
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Term
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Definition
Made from Anterior and Posterior Cardinal veins. Main venous drainage system of the embryo. Subcardinal veins: drain kidneys Supracardinal veins: Drain the body wall by way of intercostal veins, taking over the functions of the posterior cardinal veins. Sacrocardinal veins: Drains lower extremities. Forms Vena Cava Forms Azygos veins
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Term
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Definition
| · Superior Vena Cava is formed by the right common cardinal vein & the proximal portion of the right anterior cardinal vein· Inferior Vena Cavao Right Subcardinal Vein becomes the main drainage channel & develops into the renal segment of the IVCo Right Sacrocardinal Vein becomes the sacrocardinal segment of the IVCo When the renal segment of the IVC connects with the hepatic segment, which is derived from the right vitelline vein, the IVC, consisting of hepatocardinal, subcardinal, renal, & sacrocardinal segments is complete |
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Term
| Formation of Azygos vein: |
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Definition
| o Posterior cardinal veins will obliterate & supracardinal veins will assume a greater roleo The 4th & 11th right intercostal veins empty into the right supracardinal vein, which together with a portion of the posterior cardinal vein forms the azygos vein |
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Definition
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Term
| What Cardinal vein does NOT make vena cava? |
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Definition
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Term
| What aortic arch does the ductus arteriosus form from? |
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Definition
| from a connection between 5th and 6th |
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Term
| Endocardial Cushion Defect |
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Definition
Origin is from NEURAL CREST CELLS -persistant atrialventricular canal combined with defect in cardiac septum. -can be acyanotic or cyanotic |
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Term
| What is the embryonic origin of the heart? |
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Definition
| Splanchnopleural mesoderm of lateral plate |
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