Ivan ?aja's Human Design Chart

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Serbian biologist, physiologist, author and philosopher. He was founder of the first Chair for physiology among the South Slavs and of the Institute for Physiology of Serbia, rector of the University of Belgrade and member of the Serbian Academy of Science and Arts. ?aja was a big popularizer of biology, champion of the research in the role of the adrenal glands in thermoregulation and laid pioneering work in hypothermia, to which he contributed with inventing several experimental methods named after him and coining some new terms in the field. He died on 1 October 1957, aged 73, in Belgrade.
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