Red blood cells are the most common type of
blood cell and the
vertebrate body's principal means of delivering
oxygen from the
lungs or
gills to body tissues via the
blood. Red blood cells are also known as RBCs, 'haematids or erythrocytes (from
Greek erythros for "red" and kytos for "hollow", with cyte nowadays translated as "cell"). "RBCs" should in fact be referred to as "corpuscles" rather than "cells". Indeed, a 'cell' contains a nuclear element, mature RBCs do not contain a nucleus in mammals.
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Red blood cells (RBCs) are cells that carry oxygen in the blood. They are also called red corpuscles.