A plan for--or a summary of--a writing project or speech. An outline is usually in the form of a list divided into headings and subheadings that distinguish main points from supporting points. Most word processors contain an outlining feature that allows writers to format outlines automatically.
Osteoblasts are bone-forming cells that descend from osteoprogenitor cells. They form a protein mixture known as osteoid, which mineralizes to become bone. Osteoid is primarily composed of Type I collagen.Osteoblasts also manufacture hormones, such as prostaglandins, to act on the bone itself.steocytes: Osteocytes are mature bone cells that originate from osteoblasts, which have migrated into and become trapped and surrounded by bone matrix, produced by themselves. The spaces they occupy are known as lacunae.
Bone cells that liquefy the bone matrix and release calcium into  the blood are called Osteoclasts. Immature or matrix depositing  bone cells are called osteoblasts.Edit. Bone cells are regularly being removed and replaced, much like the cells in your tissues and organs. 2  Ostâ¦. 3  The Five Major Parts of the Brain At its most basic, the brain controls the body.