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three major types of cells found in blood

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Describe the three major types of cells found in blood and their respective functions.

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Three major types of cells found in blood are overviewed.

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The three major types of blood cells in blood are:

1. Erythrocytes (red blood cells or RBCs) are small biconcave "cells" whose primary responsibility is to carry oxygen (O2) to the tissues from the lungs. They are filled with hemoglobin, a four-subunit protein that contains iron. Each hemoglobin molecule binds four oxygen atoms. The reason I said that that they are "cells" as opposed to just cells (without the quotation marks) is that these RBCs do not contain any internal organelles. While they were ...

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