Which statement best describes red marrow versus yellow marrow histology?

Which statement best describes red marrow versus yellow marrow histology?

• A. Yellow marrow is adipose tissue with few hematopoietic cells.
• B. Red marrow contains hematopoietic tissue with various blood cell precursors.
• C. Red marrow adipose tissue with few hematopoietic cells.
• D. Yellow marrow contains hematopoietic tissue.

Answer: (B)

Red marrow is the active site of hematopoiesis, containing hematopoietic tissue with developing blood cell precursors in a supportive reticular framework. This means you’ll find erythroid, myeloid, and megakaryocytic lineage cells maturing there, along with a rich blood supply. Yellow marrow, in contrast, is primarily adipose tissue with few hematopoietic cells and serves mainly as fat storage; it can convert back to red marrow only under certain conditions. So the statement that red marrow contains hematopoietic tissue with various blood cell precursors best describes red marrow histology, while the other descriptors mix in adipose dominance or misplace hematopoietic activity.

Red marrow is the active site of hematopoiesis, containing hematopoietic tissue with developing blood cell precursors in a supportive reticular framework. This means you’ll find erythroid, myeloid, and megakaryocytic lineage cells maturing there, along with a rich blood supply. Yellow marrow, in contrast, is primarily adipose tissue with few hematopoietic cells and serves mainly as fat storage; it can convert back to red marrow only under certain conditions. So the statement that red marrow contains hematopoietic tissue with various blood cell precursors best describes red marrow histology, while the other descriptors mix in adipose dominance or misplace hematopoietic activity.