The developing human heart, at day 30. The septum primum (top middle) grows down to separate the primitive atrium into the left and right atrium of the human heart.
Details
Carnegie stage
13
Days
29
Gives rise to
atrial septum
Identifiers
Latin
septum primum
Anatomical terminology
[edit on Wikidata]
During heart development of a human embryo, the single primitive atrium becomes divided into right and left by a septum, the septum primum. The septum primum (from Latin 'first septum') grows downward into the single atrium.
becomes divided into right and left by a septum, the septumprimum. The septumprimum (from Latin 'first septum') grows downward into the single atrium...
right atrium to the left. As the septumprimum grows, the ostium primum progressively narrows. Before the ostium primum is completely occluded, a second...
The Primum Mobile is the outermost moving sphere in the geocentric model of the universe in medieval and Renaissance astronomy. The septumprimum is a...
interatrial foramen or ostium primum (or interatrial foramen primum). The foramen lies beneath the edge of septumprimum and the endocardial cushions....
fusion of the septumprimum and the septum secundum; in healthy hearts, this fusion form the fossa ovalis, a portion of the interatrial septum which corresponds...
downward from the upper wall of the atrium immediately to the right of the septumprimum and ostium secundum. It is important in the closure of the foramen ovale...
septumprimum, a precursor to the interatrial septum of the human heart. It is not the same as the foramen ovale, which is an opening in the septum secundum...
continued shunting of blood. A second septum (the septum secundum) begins to form to the right of the septumprimum. This also leaves a small opening, the...
foramen, below the free margin of the septum. This opening is closed by the union of the septumprimum with the septum intermedium, and the communication...
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...
atrioventricular septum is a septum of the heart between the right atrium (RA) and the left ventricle (LV). Although the name "atrioventricular septum" implies...
atrium, producing an increase in pressure that pushes the septumprimum against the septum secundum, closing the foramen ovale and completing the separation...
the lungs. Within seconds after birth, a flap of tissue known as the septumprimum that previously acted as a valve closes the foramen ovale and establishes...
atrium descends the septumprimum, which grows towards the endocardial cushions within the atrial canal. Right before the septumprimum fuses with the endocardial...
heart bulges, further develops, and begins to beat in a regular rhythm. Septumprimum appears. Pharyngeal arches, grooves which will form structures of the...
intermediate mesoderm sinus venosus mesonephric duct upper limb buds septumprimum foramen primum ureteric bud Development of the Olfactory nerve and the early...
For orientation, the left atrium is identified by the presence of the septumprimum and the pulmonary veins. Cardiac situs can be determined by identifying...
involved in cardiac conduction regulation of cardiac muscle contraction septumprimum development regulation of heart rate by cardiac conduction regulation...
congenital heart disease, abnormal ventral folding, and defects in the cardiac septum separating the atria and ventricles, and hypoplasia of the ventricular myocardium...
Global Information