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6 Cards in this Set
- Front
- Back
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Umbilical stalk |
2 small arteries 1 large vein Wharton's jelly |
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Chorion |
Endometrium Becomes placental unit 1 |
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Cardiovascular development |
First organ to form Completed by week 8 Fetal heart at 20 weeks |
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What are the three main structures of a developing heart |
Bulbis Cordis Ventricular bulge Atrial bulge |
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Significant events in heart development |
1. From day 23-28 dextral loop occurs and pushes and pushes atrial bulge up top 2. Endocardial cushions are formed creating four chambers 3. Week 4 verticals have matured and unidirectional blood flow starts 4. Week 8 all valves and chambers are formed and blood is flowing through the heart |
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Important events in extrauterine life |
1. Increased pulmonary blood flow (decreasing PVR) 2. Closure of foramen Ovale due to increasing left atrial pressures 3. Closure of ductus Arteriosus due to increased prostaglandins and increased aortic pressures 4. Ductus venosus closes in first week of life |
