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What are the four subclasses of connective tissue?
connective tissue proper, cartilage, bone, and blood
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 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 are proteoglycans?
substances that contain polysaccharides known as GAGs, the more GAGs in the matrix, the stiffer it is
formed from protein elastin STRETCHY allows stretching of connective tissue like in skin, llungs, and blood vessel walls
each type of connective tissue hold fundamental cell type, immature and growing they secrete ground substances and fibers and divide rapidl, the "blast" stage
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
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 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
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 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
lots of collagen fibers, giving great resistance to tension, fibers run in one direction
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