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MC Bio 204 ch 4 CT

connective tissues

mesenchyme embryonic tissue that is the ancestor of all connective tissue
two major elements of extracellular matrix ground substances and fibers
three major types of ground substance proteoglycens, cell adhesion molecules, interstitial fluid
three major types of fiber collagen, elastic fibers, reticular fibers
fibroblasts CT cells that produce matrix material
macrophages a type of phagocyte; engulf + devour foreign bodies
plasma cells F/produce antibodies
mast cells F/produce heparin (an anticoagulant) and histamine (a secretion that makes capillaries leaky, aiding in inflammation)
collagen fibers A/often appear pink on slides || L/heavy presence in tendons and ligaments || F/flexibility and strength
tendons LF/connect muscle and bone
ligaments LF/connect bones
reticular fibers A/form branching networks || LF/support organs || L/blood vessels, areolar CT, adipose CT, smooth MT
elastic fibers A/smaller and thinner than collagen fibers || F/easily return to original strength after stretchingL/blood vessels, skin, lung tissue
-blast refers to an immature cell that can still undergo cell division
-cyte refers to a mature cell that no longer undergoes cell division; maintains matrix as it is
areolar CT the "classic type" of CT; contains all 3 types of fiber || A/large mast cells embedded amid smaller fibroblasts || L/perimeter of organs || F/collagen fiber resists tensile force
adipose CT A/much less extracellular matrix than most CT || A/nuclei are displaced to the edges of cells || L/surrounding heart, eyes || L/breasts, hips, abdomen, buttocks || F/energy reserve, insulation, padding/protection of organs
reticular CT A/can be confused with elastic cartilage || A/dense networks of dark, branched, short reticular fibers || L/lymph nodes, bone marrow, thymus || F/netlike structures catch + filter material in lymph before it returns to the cardiovascular system
three major types of loose connective tissue areolar CT, adipose CT, reticular CT
five types of connective tissue loose CT, dense CT, cartilage, osseous tissue (bone), liquid CT (blood and lymph)
three major types of dense connective tissue dense regular CT, dense irregular CT, elastic CT
Created by: dglenn34