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gaps (about 1 micrometre long) that occur between the myelin sheaths generated by consecutive Schwann cells. Because the axon membrane is uninsulated at the nodes of Ranvier, it is capable of generating electrical activity here.
an organ system that passes nutrients, gases, hormones, blood cells, etc. to and from cells in...
an area of land which is usually covered with shallow water, and which supports plants adapted...
a blind-ending lymphatic capillary found inside each villus for the absorption of the end...
a state in which the body temperature has dropped to dangerously low levels.