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The escape of blood from the vessels, bleeding.
Small haemorrhages are classified according to size as petechiae (very small), purpura (up to 1 cm) and ecchymoses (larger). The massiveaccumulation of bloodwithin a tissue is called a haematoma.
Origin: Gr. Rhegnynai = to burst forth
This entry appears with alow from the Vocabulary of Cell and Molecular Biology