septum primum


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Related to septum primum: Ostium primum, foramen ovale

septum primum

[′sep·təm ′prē·məm]
(embryology)
The first incomplete interatrial septum of the embryo.
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References in periodicals archive ?
10 In the current study it was seen that interatrial septum which formed from septum primum was not entirely closed and had small gaps in it at day 7 and these remained even till hatching.
12) The patent foramen ovale is the most common form of ASD usually results from abnormal resorption of septum primum during the formation of foramen secundum.
The division of common atrium into right and left chambers was first achieved by appearance of crescent shaped septum primum in 1.