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Post by noormehak on Nov 17, 2017 23:06:04 GMT
I think that he talks about this simple species to demonstrate the evolution of body mechanisms related to vision and also to show body sensitivity in this organism. This species avoids predators despite not having specialized sensing regions. The starfish do not have eyes and have a simple nervous system, this shows the primitive steps of evolution. There is a signalling system that is in some way sensitive to certain things in the environment and sends signals for the activation of nerves. The patterns of waves change and allow it to detect predators. There is body to nervous system signalling and this can also help to understand body to mind influences. The human eye is very complex compared to the starfish, however the underlying concept is very similar. There is modification of a specialized part of the body and this change is transferred to the central nervous system. In humans, even if there is damage to the retina, the body is still sensitive to light or dark. Evolution has worked in homeostatic ways for the survival of the organism, this however does get more complex as the organisms become more complex. In a way, our body is sensitive to day and night similar to the simpler species detecting predators, because of the light being detected around the organism, not necessarily specifically in the cones and rods. The mind is an expansion, it wasn’t needed for homeostasis until the organism became more and more complex.
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