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Septum secundum
A labelled diagram of the developing heart, showing the relationship between the septum secundum (by the right atrium) and the septum primum (by the left atrium).
Same heart as above, opened on right side. (Septum secundum visible in dark area at center top.)
Details
Carnegie stage
14
Days
33
Gives rise to
Atrial septum
Identifiers
Latin
septum secundum
Anatomical terminology
[edit on Wikidata]
The septum secundum is a muscular flap that is important in heart development. It is semilunar in shape, and grows downward from the upper wall of the atrium immediately to the right of the septum primum and ostium secundum. It is important in the closure of the foramen ovale after birth.
The septumsecundum is a muscular flap that is important in heart development. It is semilunar in shape, and grows downward from the upper wall of the...
The foramen secundum or ostium secundum is a foramen in the septum primum, a precursor to the interatrial septum of the human heart. It is not the same...
of the septum primum, the septumsecundum begins to form. This thick, muscular structure initially takes on the same crescent shape as the septum primum...
fusion of the septum primum and the septumsecundum; in healthy hearts, this fusion form the fossa ovalis, a portion of the interatrial septum which corresponds...
the septum primum; this opening is known as the foramen ovale (ostium secundum of Born) and persists until birth. A second septum, the septumsecundum, semilunar...
(the ostium secundum) begins to form in the upper atrium enabling the continued shunting of blood. A second septum (the septumsecundum) begins to form...
a new fold appears, called the septumsecundum. At its right side it is fused with the left venous valve and the septum spurium. A free opening will then...
appear in the superior part of the septum primum, forming the ostium secundum (from Latin 'second opening'). The septum primum will eventually form part...
called the septumsecundum. The free edges of the septumsecundum produce an orifice called foramen ovale, which closes after birth when the septum primum...
atrium, producing an increase in pressure that pushes the septum primum against the septumsecundum, closing the foramen ovale and completing the separation...
foramen lies beneath the edge of septum primum and the endocardial cushions. It progressively decreases in size as the septum grows downwards, and disappears...
The ostium primum atrial septal defect is a defect in the atrial septum at the level of the tricuspid and mitral valves. This is sometimes known as an...
congenital heart disease, abnormal ventral folding, and defects in the cardiac septum separating the atria and ventricles, and hypoplasia of the ventricular myocardium...
posteriorly from the toothrow. T. kabomani skulls also lack both a nasal septum and dorsal maxillary flanges. The skull possesses a meatal diverticulum...
Side view of a Spirula shell Ventral view; the siphuncle and the last septum of the phragmocone are visible Swedish botanist Carl Linnaeus described...
that house the eyeballs are large and separated from each other by a bony septum (partition). The spine has cervical, thoracic, lumbar and caudal regions...
the two species are roughly the same. The nostrils are not divided by a septum, but rather are perforate; from the side one can see through the beak. It...
auditory bullae are double-chambered, composed of two bones joined by a septum. Caniforms have single-chambered or partially divided auditory bullae, composed...
Augusto; Andrade, Denis; Perry, Steven (2003). "Structure of the posthepatic septum and its influence on visceral topology in the tegu lizard, Tupinambis merianae...
birds: The right atrioventricular valve is fixed to the interventricular septum, by a thick muscular stock, which prevents back-flow of blood into the atrium...
belong to the superfamily Poromyoidea and are carnivorous, having a muscular septum instead of filamentous gills. In May 2010, a new taxonomy of the Bivalvia...
pattern of triangles and horizontal lines. Inside is white to light gray, septum narrow, and its edge curved and tinged yellow. Sexual dimorphism in the...