Question

True or false: the primary source of red blood cells in the adult human is the bone marrow in the shafts of the long bones.

Answer 1

the primary source of red blood cells in the adult human is the bone marrow in the shafts of the long bones.
The above statement is true

Answer 2

The given statement is true. The primary source of red blood cells is the bone marrow.

What is the primary source of RBCs in humans?

Blood-forming organs, particularly the marrow of some bones, are where blood cells are actually made, not in the bloodstream itself. Red blood cells are exclusively created by the bone marrow in adult humans.

The bone marrow in a healthy adult produces enough red blood cells each week to fill approximately half a liter of blood. The body produces almost 1% of its red cells each day, and the ratio between the clearance of old red cells from circulation and red cell synthesis is finely balanced. Blood cell production varies from person to person and can average 200 billion red blood cells per day on average.

Learn more about bone marrow here:

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