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Red blood cells

Red blood cells

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Red Blood Cells: Red Blood Cells

What are

Red blood cells, also known as erythrocytes, are the red blood cells. The red blood cell is the largest element present in the blood. There are about 5 million red blood cells per cubic millimeter in the blood of a healthy adult man (about 4.5 million in women).

Red blood cell components and function

Hemoglobin is the main component of red blood cells. Reddish in color, it has the function of transporting oxygen through the different tissues of the human body. It also carries a small amount of carbon dioxide.

In addition to hemoglobin, red blood cells are also composed of ions, glucose, water and enzymes.

Main Features:

- They have a biconcave disk format;

- They have no core;

- Measure 0.007mm in diameter


Erythropoiesis is the scientific name given to the formation of red blood cells in the human body. This process happens in the bone marrow.


- An erythrocyte lives on average 100 to 120 days.

- About 2.4 million red blood cells are produced per second in our body.

- Red blood cell counts are done by a laboratory test known as a blood count.

- The red color of the blood is explained by the presence of red blood cells.

- The decrease in red blood cell size is called microcytosis. The increase is known as macrocytosis.