Red blood cell
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
Red blood cells (RBCs) are cells that carry oxygen in the blood. They are also called red corpuscles.