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5. Which of the following is true of red blood cells?

A. They live for only about 20 days
B. They have multiple nuclei
C. They live for only 120 days
D. Once created in bone marrow, they circulate for our lifetime

Sagot :

GinnyAnsweridn

Final answer:

Red blood cells live for around 120 days without a nucleus and play a crucial role in oxygen transport.


Explanation:

Red blood cells (RBCs) have an average lifespan of 120 days. They do not have a nucleus, enabling them to carry more hemoglobin for oxygen transport. Once aged, they are ingested by phagocytic cells in the liver and spleen.


Learn more about Red blood cells (RBCs) here:

https://brainly.com/question/41875530


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