Congenital affections of the heart / by George Carpenter.

  • Carpenter, George, 1859-1910.
Date:
1894
Catalogue details

Licence: Public Domain Mark

Credit: Congenital affections of the heart / by George Carpenter. Source: Wellcome Collection.

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    in position. The cavities are next differen- tiated, so that ultimately two auricles and two ventricles are formed. It is to be noted that in the partition between the auricles a special aperture is constructed which, in the course of development, becomes closed by a distinct and separate septum of its own. This aperture is the foramen ovale. The Eustachian valve appears as a fold of the lining membrane of the auricles. The septum between the ventricles is not for some time fully competent above, thus allowing a free communication between the two ventricles at its upper portion. On its completion this is termed the undefended space. This is an area of triangular shape, in which the ventricles are only separated by the endocardium and fibrous tissue on the left side, and by the lin- ing membrane and a thin layer of muscular substance on the right. Its base is formed by the muscular substance of the septum, its sides by the attachments of the right and posterior aortic valves. It has already been mentioned that the bulbus arteriosus divides into two branches or