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Earliest evidence of limb bone marrow in the fin of a 370 million year old fish
Date:3/19/2014

s Sophie Sanchez, a researcher from Uppsala University and the ESRF. "This intimate relationship, which has been demonstrated by molecular experiments in extant mammals, is actually primitive for tetrapods".

This discovery is very important for understanding the evolutionary steps that built up the distinctive architecture of tetrapod limb bones and created a location for the distinctive, complex and functionally important tissue that is bone marrow. It is also a powerful demonstration of the capabilities of synchrotron microtomography.

"Without the 3D information provided by the synchrotron, we could never have understood the internal organization of the marrow space" says Per Ahlberg from Uppsala University. "If you cut a slice through a bone like this, which would damage it irreparably, you would only see an uninformative pattern of holes in the cut surface. With the synchrotron we can image the whole internal structure and understand how the marrow processes are organized, without doing any damage to the bone at all."


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Contact: Per Ahlberg
Per.Ahlberg@ebc.uu.se
46-018-471-2641
Uppsala University
Source:Eurekalert

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