| Spitzer's theory | An interpretation of the partitioning of the heart of mammalian embryos primarily on the basis of recapitulations of the adult structural pattern of lower forms; most frequently cited in relation to the partitioning of the truncus arteriosus to form ascending aorta and pulmonary trunk, which is achieved by the phylogenetic development of the lungs. (05 Mar 2000) |
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| Spitzer, Alexander | <person> Austrian anatomist, 1868-1943. See: Spitzer's theory. (05 Mar 2000) |
| Spitzer's t. |
the formation of the septa in the heart are teleologically conditioned, phylogenetically brought about, and mechanically achieved by the appearance and development of the lungs through phylogeny.
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