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World Before Naturalists
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acid amino acids animal atoms autonomic blood body bowel brain breathing called capillaries carbon dioxide century cerebellum cerebral hemispheres chemical chemist chemistry clot color cortex creature Descartes digestive dream earth electrical endocrines enzyme everything experiment experimental eyes fact feel fibers flesh Freud frontal lobes gland goes growth-hormone head heart hemoglobin Hippocrates hormones hour human hypothalamus infant inhibition inside keep kidney laboratory legs less liver living lobotomy look lungs man's medulla membrane memory microscope mind molecules movement muscle nephrons nerve nerve-fibers nervous-system neuron neurosis never night oxygen pain Paracelsus patient Pavlov person physician physiology produced protein psychiatrist pushed red cells reflex sandlot scientist seems side skin skull sleep someone sometimes spermatozoon spinal cord stimulated stomach student surgeon surgery temporal lobes thalamus thought tion tube urine wall watch woman word