Connective Tissue Quiz
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49 terms
Terms | Definitions |
|---|---|
 What is connective tissue important for? | support and protection |
| What are the four subclasses of connective tissue? | connective tissue proper, cartilage, bone, and blood |
| Common origin | arise from mesechyme |
| mesechyme | embryonic tissue |
| degree of vascularity | range from no blood vessels to rich supply |
| extracellular matrix | much of the connective tissue is made of nonliving extracellular matrix |
| How does extracellular matrix support tissue? | it seperates living cells in the tissue and allows connective tissue to bear great weight and tension and withstand abuse |
| What are three major components of connective tissue? | ground substance, fibers, and cells |
| What makes up the extracellular matrix? | ground substance and fibers |
| What does ground substance do? | fills the space between the living cells of a connective tissue and holds fluid and acts as a fluid medium for diffusion from blood vessels to occur |
| What is the structure of ground substance | unstructured and gel like |
| What is ground substance made out of? | interstial fluid, cell adhesion proteins, and proteoglycans |
| What are cell adhesion proteins? | acts as a glue to hold living cells to a matrix |
| What are proteoglycans? | substances that contain polysaccharides known as GAGs, the more GAGs in the matrix, the stiffer it is |
| What does ground substance hold? | fibers |
| What do fibers do? | provide support |
| What are the three types of fibers? | collagen fibers, elastic fibers, reticular fiber |
| collagen fibers | most abundant, form fibers in extracelluar matrix, very TOUGH and STRONG |
| elastic fiber | formed from protein elastin STRETCHY allows stretching of connective tissue like in skin, llungs, and blood vessel walls |
| reticular fibers | delicate fibers of collagen, provides support for soft tissue |
| cells | each type of connective tissue hold fundamental cell type, immature and growing they secrete ground substances and fibers and divide rapidl, the "blast" stage |
| blast | immature stage |
| cyte | mature stage |
| connective tissue proper | fibroblast, fibrocyte |
| cartilage | chondroblast, chondrocyte |
| bone | osteoblast, osteocyte |
| blood | hemocytoblast (always activ) |
| fat cells in connective tissue | white blood cells, plasma cells, mast cells, macrophage |
| plasma cells | produce antibodies |
| mast cells | detect foreign substances, release substances to initiate inflmattory respons |
| macrophages | large phagocytic cells, eat bacteria, dust, dead tissue cells, main players in immune system |
| what are the differences in the different types of connective tissue | cell types, fiber types, and proportion of extracellular matrix |
| what do all connective tissue have in common? | mesemchyme, as embryo develops, mesemchyme cells differentiate into different types of connective tissue |
| connective tissue proper | all connective tissue belongs to this except bone cartilage and blood |
| what are the two subclasses of connective tissue proper | loos connective tissue and dense connective tissue |
| what are the three types of loose connective tissue | they have few fibers; areolar, adipose, and reticular |
| what are the types of dense connective tissue | packed with fibers; dense regular, dense irregular, and elastic |
| what are the cells called in areolar connective tissue | fibroblasts |
| what does areolar connective tissue serves as | packaging materian for organs and other tissues, holds water, and soaks up excess fluid in inflamed areas, and caused swelling edema |
| adipose | basically areolar connective where the nutrients storing function is greatly enhanced, fat cells called adipocytes present, every cell stores a nutrient rich oild droplet, |
| what percentage of an average person is fat cells | eighteen |
| reticular connective tissue | reticular fibers are present |
| what do the fibers in reticular connective tissue form | delicate network called stromma in the spleen and lymph nodes which support free blood cells in these structures |
| dense regular | lots of collagen fibers, giving great resistance to tension, fibers run in one direction |
| which type of dense connective tissue forms tendons and ligaments | dense regular |
| tendons | bones to muscles |
| ligaments | bone to bone |
| elastic connective | ligaments containg lots of elastic fivers, stretch |
| dense irregular connective tissue | fibers arranged irregulary, not all in one direction |
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