This cell resembles a glia cell, express the glial marker S100 and act as a supporting cell to type I cell. This cell is located in a small cluster of type I and type II cells near the fork of the carotid artery. [ http://en.wikipedia.org/wiki/Carotid_body http://www.ncbi.nlm.nih.gov/pubmed/7938227 GOC:tfm ]