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specialised heart muscle tissue between the right atrium and right ventricle which conducts the normal electrical impulse from the atria to the ventricles.
unable to notice or respond to things that you would usually be aware of through your senses....
when the entire heart, both of the atria and ventricles, is relaxed.
microscopic canals running longitudinally through compact bone tissue that contain blood vessels...
long threads of genetic material (DNA and histone) found in the nucleus of a non-dividing cell...