There are three types of bone cells. Osteoclasts, Osteoblasts, and Osteocytes. Osteoblasts are bone cells that use collagen and protein to form new bone if it is needed. Osteoclasts come from bone marrow and are large cells that dissolve bone. Osteocytes are cells found on the inside of bones. Osteocytes can sense if there is a crack in the bone and then be surrounded by new bone as it heals.
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Normally, people produce about 100 billion white blood cells a day. ... However, an increase in the number of white blood cells is also caused by cancers of the bone marrow (such as leukemia) or by the release of immature or abnormal white blood cells from the bone marrow into the blood.
Overview of White Blood Cell Disorders - The Merck Manuals
https://www.merckmanuals.com/.../blood-disorders/white-blood-cell-disorders/overview-...
Answer:
Burning
Explanation:
Burning is a chemical change, not a physical one
Because they let any organisms to grow,develop,survive, and reproduce.