Umbilical cord, light micrograph
Light micrograph of Wharton鈥檚 jelly, which is the substance in an umbilical cord that is present in between the umbilical vessels (the vessels are not seen in this picture, only the jelly substance). in this picture, only the jelly substance). A few nuclei of cells (the small dark blue round-oval structures) are interspersed in the substance. Haematoxylin and eosin stained tissue section. Magnification: 400x when printed at 10cm. by ZIAD M. EL-ZAATARI/SCIENCE PHOTO LIBRARY
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