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Connective_Tissue - Connective Tissue fat blood bone...

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Connective Tissue: fat, blood, bone, cartilage Unique characteristics: Range of vascularity (as opposed to avascular epithelium) Tissue cell surrounded by extracellular material Extracellular material: composed of three types of fibers, fibers often arranged in parallel collagen : clear, cylindrical, vary in length elastic: able to stretch to 150% of resting length dye to elastic protein reticular: creates 3-D mesh network, as opposed to collagen’s parallel alignment ground substance : clear, viscous fluid, fills space in between fibers Connective tissue proper: Fat: number of fat cells established in first few weeks of infants life. Past adolescence adipocytes (fat cells) increase or decrease in size; they do not seem to increase in number (hyperplasia) Dense regular connective tissue: tendons, ligaments: collagen fibers arranged in parallel to the forces applied to tissue Dense irregular connective tissue: covering of organs (capsule) and bones (periosteum); fibers arranged in varying directions to resist force from multiple directions Fluid connective tissues: blood Supporting connective tissues: cartilage (pg 128, fig 4-12, text) and bone Hyaline cartilage: covers bone surfaces at synovial joints, trachea and bronchi. Most common type of cartilage Well hydrated. Provides a smooth surface, which reduces friction. Many collagen fibers provide strength and flexibility- Translucent
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