Chapter 21 of Writing Today Using Basic Rhetorical Patterns Introduction Definition Classification Comparison and Contrast Rhetorical patterns are useful for writers to arrange ideas into sections and paragraphs (425).
Bone marrow stromal cells. A general term for non-blood cells in the bone marrow, such as fibroblasts, adipocytes (fat cells) and bone- and cartilage-forming cells that provide support for blood cells.
As those cells divide, they change in shape and  structure to form cells such as liver cells, brain cells, and  muscle cells. This process is called differentiation, because it  forms cells that look different from one another and perform  different functions. + 24 others found this useful.