Opening in the septum primum between the two atria of the embryonic heart[TMD]. [ http://medical-dictionary.thefreedictionary.com/foramen+primum http://en.wikipedia.org/wiki/Primary_interatrial_foramen ]
Synonyms: primary interatrial foramen ostium primum interatrial foramen primum
Term information
- SCTID:308852002
- Wikipedia:Primary_interatrial_foramen
- UMLS:C1517292 (ncithesaurus:Foramen_Primum)
- EHDAA2:0001826
- EMAPA:17012
- VHOG:0001470
- NCIT:C34178
First of the two openings to perforate the septum primum between the two atria of the embryonic heart. [TFD][VHOG]
The tetrapod clade develops a complete atrial septum and loses the fifth aortic arch altogether. [ISBN:978-0030223693 Liem KF, Bemis WE, Walker WF, Grande L, Functional Anatomy of the Vertebrates: An Evolutionary Perspective (2001) p.620]; [about heart development] In the various tetrapod classes ontogenetic events essentially recapitulate the phylogenetic stages.[well established][VHOG]