Q:

Closure of the foramen primum results from fusion of which of the following struc- tures?

waelhammad
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Closure of the foramen primum results from fusion of which of the following struc-tures?

  1. Septum secundum and the fused atrioventricular cushions
  2. Septum secundum and the septum pri- mum
  3. Septum primum and the fused atrioven- tricular cushions
  4. Septum primum and the septum spurium
  5. Septum primum and the sinoatrial valves
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waelhammad
2022-11-10
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C. The foramen primum forms between the free edge of the septum primum and the atrioven-tricular (AV) cushions. It is closed when the septum primum fuses with the AV cushions.

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