Overview The use of manipulatives in teaching mathematics has a long tradition and solid research history.
Red bone marrow is the active portion that produces red blood cells, while yellow bone marrow contains fat cells. In adults the red bone marrow is located in the flat bones, such as the upper hip bones, known as the pelvic girdle, and the sternum.
2) the red marrow in bones produces white blood cells which protect against invading microorganisms. movement - bones form joints which provide levers for movement such as walking, lifting, etc. hematopoiesis (blood cell production) - the red marrow produces both red and white blood cells. mineral storage and homeostasis - the skeleton forms a reservoir of minerals, especially calcium, for maintenance of homeostasis. Cells found in bone tissue: osteoprogenitor cells - these are like stem cells for bone