SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY
Blood vessels from the colon (large intestine), coloured scanning electron micrograph (SEM). These vessels are from the capillary bed of the mucous membrane of the colon. This is a cast: the vessels were filled with a resin, which then set. The surrounding tissues were then eaten away chemically, leaving the cast of the vessels. Magnification: x290 when printed 10cm wide.
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