Which Cell Part, Found In Virtually All Cells, Are Red Blood Cells Missing? written

Red blood cells are missing the nucleus, which is a cell part found in virtually all cells. This is to increase surface area so that more hemoglobin is present which combines with oxygen to increase the oxygen carrying capacity of the blood. This is a specialization that allows red blood cells to carry oxygen more efficiently than other cells.

Red blood cells are produced in the bone marrow. They lose their nucleus as it increases its surface area to volume ratio, meaning there is a greater chance for the oxygen to attach onto its hemoglobin . The cytoplasm of a red blood cell is rich in hemoglobin, an iron-containing biomolecule that can bind oxygen and is responsible for the red color of the cells and the blood. Each human red blood cell contains approximately 270 million hemoglobin molecules .

In addition to their lack of nuclei, red blood cells also lack mitochondria, Golgi apparatus and endoplasmic reticulum . Reticulocytes are immature red blood cells that still contain some organelles such as mitochondria and ribosomes . However, these organelles are lost as the cell matures into a fully functional erythrocyte.

Here are some websites that discuss Which Cell Part, Found In Virtually All Cells, Are Red Blood Cells Missing?:
- https://www.answers.com/natural-sciences/Which_part_is_missing_from_a_humans_red_blood_cells
- https://en.wikipedia.org/wiki/Red_blood_cell
- https://sage-answers.com/what-cell-part-is-virtually-all-cells/
- https://www.khanacademy.org/science/biology/human-biology/circulatory-pulmonary/v/red-blood-cells
- https://www.khanacademy.org/science/biology/human-biology/circulatory-pulmonary/a/components-of-the-blood

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