5.  Cells are spread through an extracellular fluid.  Ground substance - A clear, colorless, and viscous fluid containing glycosaminoglycans and proteoglycans to fix the body water and the collagen fibers in the intercellular spaces, fills the space between the cells and contains the fibers.Ground substance slows the spread of pathogens.  Fibers. Not all types of CT are fibrous. Examples of non-fibrous CT include adipose tissue and blood.

6. A variety of cells with different origins and functions are present in connective tissue 1)Fibroblasts 2)mast cells 3) macrophages 4)plasma cells 5)Adiposities cells

7. Macrophage Fibroblast Lymphocyte Fat cell Mast cell Neutrophil Capillary Cell typesExtracellular matrix Fibers Collagen fiber Elastic fiber Reticular fiber Ground substance

18.  Collagen is the most common protein found in the human body.  It is found in almost all organs and body parts.  In general, collagen winds itself into a fiber mesh that adds structural stability to that specific body part.  It is commonly associated with skin integrity, but is critical for proper function of many other body parts, too.  At least 12 types of collagen exist, four of which are commonly found in different body parts.  Type I collagen is the most abundant type

19.  composed of type III collagen secreted by reticular cells.  Reticular fibers crosslink to form a fine meshwork (reticulin).  This network acts as a supporting mesh in soft tissues such as liver, bone marrow, and the tissues and organs of the lymphatic system.

20.  are bundles of proteins (elastin) found in extracellular matrix of connective tissue  produced by fibroblasts and smooth muscle cells in arteries.  These fibers can stretch up to 1.5 times their length, and snap back to their original length when relaxed.  Elastic fibers include elastin, elaunin and oxytalan.