BIOL 3100 Chapter Notes - Chapter 2.5: Dense Irregular Connective Tissue, Reticular Cell, Aponeurosis

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19 Oct 2019

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MATURE CONNECTIVE TISSUE: Loose

Connective Tissue

Loose Connective Tissue: Areolar Tissue

• Most widely distributed, i.e. skin

• Composition: fibers (ALL 3; collagen, elastic, reticular), cells (fibroblast,

macrophage, plasma cells, adipocytes, mast cells) embedded in semifluid

ground substance

• Function: strength, elasticity, support

Loose Connective Tissue: Adipose Tissue

• Composition: Adipocytes

• Function: insulation (i.e. protect heart), energy reserves

• Types: white (common), brown (generates heat in newborns)

Loose Connective Tissue: Reticular Tissue

• Composition: Interlacing reticular fibers + reticular cells

• Forms the stroma of liver, spleen, lymph nodes

MATURE CONNECTIVE TISSUE: Dense Connective Tissue

Dense Connective Tissue: Regular

• Bundles of collagen fibers, arranged parallel for strength

• Forms tendons + ligaments + aponeuroses

Dense Connective Tissue: Irregular

• Collagen fibers irregularly arranged

• Location: where pulling forces are exerted in many directions – heart + skin

• Function: strength

Dense Connective Tissue: Elastic

• Composition: Branching elastic fibers

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