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.
SEARCH. Bone tissue contains five basic types of bone cells. There are cells which are responsible for the response of the body to trauma and fracture, and those which secrete the basic chemical compound which bones are made of.There are cells mature bone cells and cells that break down the bone tissue.he cells which create the lining of the bones are derived from the osteoblasts. This lining of cells is found on the surface of most adult bones. These cells primarily are responsible for the regulation of phosphate and calcium through the entire bone matrix.