The structure of bone allows the bone to be hard, but not too brittle, and gives bone the strength to resist compressive and bending forces. Bone has developed a unique structure to allow the functions to occur. Because the matrix is mineralized (rather than aqueous), nutrients and waste cannot diffuse through the matrix. The 2 primary types of bone are compact and spongy. Bone Marrow: Composition and Hematopoiesis. Bone marrow is made up of a framework of connective tissue containing branching fibers with the frame being filled with marrow cells. Red marrow is a hematopoietic tissue and is the site of production of erythrocytes and granular leukocytes. Yellow marrow is found in the large cavities of large bones and consists mostly of fat cells and a few primitive blood cells. Bone marrow exists in two types, yellow and red. Connective Tissue: Histology composed of bone cells, membranes, an extracellular mineralized matrix, and central bone marrow Bone marrow The soft tissue filling the cavities of bones. Connective tissues consist of cells and an extracellular matrix. The main function of connective tissues is to provide structural support to organs.
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