interauricular

After birth, on the commencement of respiration, the foramen ovale of the interauricular septum closes, and the ductus arteriosus becomes impervious.

Surgical Anatomy Joseph Maclise

The interauricular and interventricular septa, by gradual development from without inwards, at length meet and coalesce, thereby dividing the two cavities into four -- two auricles and two ventricles -- a condition proper to the Avian and Mammalian classes generally.

Surgical Anatomy Joseph Maclise

Dugong, A similar cleavage may divide the base of the heart in the situation of the interauricular septum. 3rd.

Surgical Anatomy Joseph Maclise

In the centre of the interauricular septum of the human heart, an aperture (foramen ovale) is left as being necessary to the foetal circulation.

Surgical Anatomy Joseph Maclise

-- Such being the phases of metamorphosis of the primary (branchial) arches which yield the vessels in their normal adult condition, we obtain in this history an explanation of the signification not only of such of their anomalies as are on record, but of such also as are potential in the law of development; a few of them will suffice to illustrate the meaning of the whole number: -- lst, The interventricular as well as the interauricular septum may be arrested in growth, leaving an aperture in the centre of each; the former condition is natural to the human foetus, the latter to the reptilian class, while both would be abnormal in the human adult. 2nd.

Surgical Anatomy Joseph Maclise