RICHARD J. GREEN / SCIENCE PHOTO LIBRARY RICHARD J. GREEN / SCIENCE PHOTO LIBRARY
A tissue culture showing a hela cell colony (human fibroblasts), an established line of human epithelial cells derived from a cervical carcinoma. A fibroblast is the resident cell of connective tissue, mesodermally derived, that secretes fibrillar procollagen, fibronectin and collagenase.
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