Q:

What is the average life span of a red blood cell?

A:

Quick Answer

According to the American Society of Hematology (ASH), the average life span of a red blood cell is 120 days. New cells form in bone marrow and take about seven days before they mature and enter the bloodstream. Red blood cells make up about 40 percent of blood's volume.

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Full Answer

ASH explains that one of the functions of red blood cells is to carry oxygen from lungs to body tissues. There, they pick up carbon dioxide, a waste produce, and transport it to the lungs where it is exhaled. The protein hemoglobin is primarily responsible for these jobs. Hemoglobin gives red blood cells their color, and because of the large number of red blood cells, blood is also red.

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Related Questions

  • Q:

    How long do red blood cells live?

    A:

    A normal red blood cell lives for about 120 days. It takes about two days for the body to manufacture each red blood cell, and about two million are turned out every second. Production of new red blood cells occurs in the bone marrow.

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  • Q:

    What does a red blood cell count tell you?

    A:

    A red blood cell count indicates how many red blood cells a person has, according to MedlinePlus. Doctors use it to diagnose conditions such as anemia, as well as other medical conditions. A normal range of red blood cells for women is 4.2 to 5.4 million cells per microliter, while a normal range for men is 4.7 to 6.1 million cells per microliter.

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  • Q:

    What is considered a low red blood cell count?

    A:

    A normal red blood cell count for males is 4.7 to 6.1 million cells per microliter, and a normal count for females is 4.2 to 5.4 million cells per microliter, states MedlinePlus. Normal ranges may vary from lab to lab, and some labs may use a different form of measurement.

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  • Q:

    What is the normal range for a red blood cell count?

    A:

    A normal red blood cell count ranges from 4.7 to 6.1 million cells per microliter in males and from 4.2 to 5.4 million cells per microliter in females, states MedlinePlus. Normal values differ slightly depending on the laboratory and measurements used, so patients should discuss individual results with their doctor.

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