SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY
Stomach wall blood vessels. Coloured scanning electron micrograph (SEM) of a resin cast of blood vessels from the stomach wall. These vessels supply mucus-secreting glands. The mucus protects the stomach wall from its own acid. The cast was made by injecting resin into the blood vessels and then chemically digesting the surrounding tissues.
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