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In a child, all bone marrow is red, while an adult only has red bone marrow...

In a child, all bone marrow is red, while an adult only has red bone marrow in his/her axial skeleton.

  1. What is the function of red bone marrow?
  2. Given the statement above and the function of red bone marrow, what can you assume about a child versus an adult?
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Answer #1

Function of red bone marrow

Function of red bone marrow is the site of  hematopoiesis. red bone marrow contains hematopoietic cells

In a child, all bone marrow is red, while an adult only has red bone marrow in his/her axial skeleton because the composition of bone marrow changes when the child become an adult. In a child the bone marrow is "red" (hematopoetic cells are dominant), whereas, in an adult it gradually changes to "yellow" marrow (fat cells are dominant). In a newborn baby, all the bones are hematopoietically very active. In adults, central skeleton and ends of long bones (femur and humerus) mainly contain red marrow.

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