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5 Cards in this Set
- Front
- Back
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What is the 1st division of the lung bud?
2nd? 3rd? |
1st = R and L main stem bronchus
2nd = Lobar Bronchi 3rd = Bronchi of bronchopulmonary segments |
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What structure invaginates from the lateral embryonic thoracic wall to form part of the pericardium?
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Answer = Pleuropercardial fold - closes off channel between lung and heart.
Pleuroperitoneal fold = closes off channel between diaphragm and abdominal cavity |
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The smooth portion of the left atrium results from the absorption of the:
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Pulmonary veins. In the right atrium, the smooth portion results from absorption of the sinus venosus.
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Neural crest tissue would participate in which of the events:
1. Closure of the oval forament 2. division of the aortic sac 3. formation of the epicardium 4. mitral valve formation 5. shifting of the AV canal |
2. Division of the aortic sac
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A major accomplishment of early phase of cardiac looping is the relocation of the primitive atrium or inflow region of the heart to a position immediately dorsal (posterior) to the:
1. first pharyngeal arch artery 2. left ventricle 3. outflow region 4. proepicardial organ 5. sinus venosus |
3. outflow region
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