Connective Tissue with px

Connective Tissue with px - Connective Tissue(Chapter 6...

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1 Connective Tissue (Chapter 6, pages 146 – 181) 1. Functions a. Maintain body form b. Bind c. Support d. Anchors e. Protection: cells of the immune system; phagocytic cells f. Blood Formation g. Tissue repair and development 2. Three fundamental components of connective tissue: a. Connective tissue cells b. Extracellular fibers c. Ground substance 3. Extracellular matrix: fibers + ground substance + tissue fluid; matrix determines mechanical properties of tissue 4. Embryonic origin of connective tissue: mesenchymal tissue is derived from embryonic mesoderm except head mesenchyme which is derived from neural crest (ectoderm). Figure 6.2, page 148. 5. Classification and Types of Connective Tissue a. Classification Embryonic CT Mesenchymal CT Mucous CT A d u l t C T CT proper Loose or Areolar CT D e n s e C T D e n s e i r r e g u l a r C T Dense regular CT Specialized CT R e t i c u l a r C T E l a s t i c C T Adipose CT (Chapter 9)
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P i g m e n t e d C T Cartilage (Chapter 7) Bone (Chapter 8) Blood and Lymph (Chapter 10) b. Types of connective tissue (description) (1) Mesenchymal connective tissue: precursor of all adult CT; consists of loose array of stellate, mesenchymal cells with large intercellular spaces filled with ground substance (2) Mucous connective tissue: embryonic tissue found in Wharton's jelly; cushions; cells include mesenchymal cells and fibroblasts; few fibers (mostly collagen) 2
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(3) Loose Connective Tissue (Areolar connective tissue): Function: bind and act as a barrier to bacterial invasion; cellular CT; homogenous matrix with typical CT cells, fibers and intercellular materials. Ground substance occupies more volume than the fibers. Gel-like consistency. Located in dermis, hypodermis, glands, and mucous membranes (4) Dense Connective Tissue: same components as loose CT, but fewer cells and predominance of collagen fibers. Contains closely packed fibers in cords, bands or sheets. aa. Dense Irregular Connective Tissue: collagen fibers arranged in bundles w/o a definite orientation. Spindle-shaped fibrocytes located b/w predominately collagen fibers, although reticular and elastic fibers are present. Located in dermis, capsules. 3
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bb. Dense Regular Connective Tissue: Collagen bundle arranged according to a definite pattern. Paralleling collagenous fibers with fibrocytes compressed between them. Located in periosteum, perichondrium, aponeurosis, tendons, 4 and ligaments. -1- Tendons
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Connective Tissue with px - Connective Tissue(Chapter 6...

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