Bone
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A bone is a rigid organ that constitutes part of the skeleton in most vertebrate animals. Bones protect the organs of the body, produce red and white blood cells, store minerals, help regulate acid-ba
A bone dating from the Pleistocene Ice Age of an extinct species of an elephant, possibly a mammoth
A scanning electronic micrograph of a Wistar rat's bone at 10,000× magnification
Structure of a long bone
Cross-section details of a long bone
Bone marrow
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Bone marrow is a semi-solid tissue found within the spongy portions of bones. In birds and mammals, bone marrow is the primary site of new blood cell production. It is composed of hematopoietic cells,
Bone
…salts. Bone tissue comprises cortical (compact) bone and cancellous (spongy) bone, although bones may also contain other kinds of tissue including bone marrow, endosteum, periosteum, nerves, blood vessels, and cartilage. In the human body at birth, approximately 300 bones are present. Many of these fuse…
A section of bone marrow tissue (Prussian blue-stained)
Bone marrow aspirate showing normal "trilineage hematopoiesis": myelomonocytic cells (an eosinophil myelocyte marked), erythroid cells (an orthochromatic erythroblast marked), and megakaryocytic cells
Hematopoietic precursor cells: promyelocyte in the center, two metamyelocytes next to it and band cells from a bone marrow aspirate
A Wright's-stained bone marrow aspirate smear from a patient with leukemia