Other articles where germ cell is discussed: soma: …between the soma and the germ cells was propounded by the 19th-century German biologist August Weismann in the “germ plasm” theory that emphasized the role of the immortal, heredity-carrying genes an
The first report of cell death was by Vogt in 1842, which was remarkably soon after the establishment of the cell theory by Schleiden and Schwann between 1838 and 1842. Initial studies on cell death, including that of Vogt, focused on its occurrence in metamorphosis (Vogt, 1842; Prévost ...
by this latter atomistic view, which reached its fullest development in the period between Newton’s laws of physics and Dalton’satomic theoryof chemistry in the early 19th century. This outlook was never easilyreconciledwith the observations of biologists, and in the last hundred years a series...
rejected Weismann’s theory and he did experiments on tadpoles which gave him two ideas on his book on regeneration: First, regeneration is a natural process related to normal development and differentiation. Second, cell fate is not predetermined by heredity or bythe cell’s position in the org...
FormulationoftheCellTheory Thecelltheory(proposedindependentlyin1838and1839)isacornerstoneofbiology.Allorganismsarecomposedofoneormorecells.Cellsarethesmallestlivingthings.Cellsareformedourofspontaneousprocesslikecrystal.Schleiden Schwann RudolphCarlVirchow Thecorrectinterpretationofcellformationbydivisionwasfinallypromotedby...
In 1835, Gabriel Gustav Valentin examined muscle formation during embryogenesis and described how corpuscles of the primordial mass align and fuse to form a transparent mass, the muscle fibre [10]. This view was adopted and refined by Theodor Schwann (cofounder of the cell theory) in 1839, wh...
as was previously proposed by August Weismann. Roux's experimental approach to explore this process was to destroy one of the two blastomeres resulting from the first cleavage, and the result of this intervention was a "half-embryo" as he predicted. Driesch expected to find similar results, bu...
Review of the secondary injury theory of acute spinal cord trauma with emphasis on vascular mechanisms. J. Neurosurg. 1991, 75, 15–26. [Google Scholar] [CrossRef] Muthu, S.; Jeyaraman, M.; Gulati, A.; Arora, A. Current evidence on mesenchymal stem cell therapy for traumatic spinal ...