Magic embryology: forming fetus totally unexplained (Introduction)

by David Turell @, Saturday, January 27, 2018, 21:33 (1656 days ago) @ David Turell

Scientists currently have no explanation for the development of animal form:

Abstract: " We present a plausible account of the origin of the archetypal vertebrate bauplan. We offer a theoretical reconstruction of the geometrically regular structure of the blastula resulting from the sequential subdivision of the egg, followed by mechanical deformations of the blastula in subsequent stages of gastrulation. We suggest that the formation of the vertebrate bauplan during development, as well as fixation of its variants over the course of evolution, have been constrained and guided by global mechanical biases. Arguably, the role of such biases in directing morphology—though all but neglected in previous accounts of both development and macroevolution—is critical to any substantive explanation for the origin of the archetypal vertebrate bauplan. We surmise that the blastula inherently preserves the underlying geometry of the cuboidal array of eight cells produced by the first three cleavages that ultimately define the medial-lateral, dorsal-ventral, and anterior-posterior axes of the future body plan. Through graphical depictions, we demonstrate the formation of principal structures of the vertebrate body via mechanical deformation of predictable geometrical patterns during gastrulation. The descriptive rigor of our model is supported through comparisons with previous characterizations of the embryonic and adult vertebrate bauplane. Though speculative, the model addresses the poignant absence in the literature of any plausible account of the origin of vertebrate morphology. A robust solution to the problem of morphogenesis—currently an elusive goal—will only emerge from consideration of both top-down (e.g., the mechanical constraints and geometric properties considered here) and bottom-up (e.g., molecular and mechano-chemical) influences." (my bold)

Another review of it:

"Embryo geometry, developed by a team from the University of San Diego, Mount Holyoke College, Evergreen State College, and Chem-Tainer Industries, Inc.. in the USA, looks at animal complexity generally and the vertebrate body in particular as more the products of mechanical forces and the laws of geometry than solely the outcome of random genetic mutation.

"'At the suggestion of evolutionary biologist Stephen Jay Gould, preliminary attempts at a solution to this problem were undertaken over many years. But these -- as well as other, similar efforts -- were met with strong opposition by supporters of the Neo-Darwinian interpretation of natural selection," commented senior author Stuart Pivar. "We hope that the theory of embryo geometry will stimulate further investigation by biologists of all stripes across a variety of fields."

"Anatomists have long postulated that animal complexity arises during development of the embryo -- called embryogenesis -- but despite detailed descriptions of the embryonic stages of all major types of animal, the evolution of organismal complexity and its expression during individual development have remained mysterious processes -- until now.

"The researchers behind embryo geometry have shown that the vertebrate embryo could conceivably arise from mechanical deformation of the blastula, a ball of cells formed when the fertilized egg divides. As these cells proliferate, the ball increases in volume and surface area, altering its geometry. The theory posits that the blastula retains the geometry of the original eight cells produced by the first three divisions of the egg, which themselves determine the three axes of the vertebrate body.


"These illustrations explain how the vertebrate body might plausibly arise from a single cell, both over evolutionary time, and during individual embryogenesis."

Comment: Daarwinism has no explanation for embryogenesis. No genes are found to controlthe formation of animals or plants, thus the result to proposing mechanical factors which somehow create a completely organized living individual. This is the black box of Darwin theory as Cornelius Hunter observed. Perhaps through a mechanism at a quatnum level designed by God.

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