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HYALINE CARTILAGE
- Characteristics: avascular; glass-like appearance; mostly ground substance and other non-cellular components, such as type II collagen fibers.
- Function: support of structrues, reduction of friction between surfaces, limited flexibility.
- Location: C-rings of trachea, articular surfaces, nasal cartilage.
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ELASTIC CARTILAGE
avascular; elastic fibers stain dark and are visible; contains type II collagen. - Function: elasticity of cartilage.
- Location: auditory canal, external ear, epiglottis.
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FIBROCARTILAGE
avascular: chondrocytes arranged in rows; no periochondrium. - Function: joins certain, adjacent bones together; provides cushioning for vertebrae.
- Location: symphyses, Eustachian tube, invertebral disks, tendon insertions.
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ENDOCHONDRAL OSSIFICATION
hypertrophy of chondrocytes and invasion by periosteal bud. - Function: forming of marrow; bone growth.
- Location: short and long bones.
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ENDOCHONDRAL OSSIFICATION, MAGNIFIED
cartilage serves as mold for ossification; chondrocytes hypertrophy, and osteoblasts secrete matrix while osteoclasts degrade matrix - Function: forming of marrow; bone growth.
- Location: short and long bones.
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OSTEOCLASTS
multinuclear. - Function: bone resorption and remodeling of bone.
- Location: along the trabecula in Howship's lacunae.
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CANCELLOUS (SPONGY) BONE
low-density; porous with numberous trabeculae. - Function: site for hemopoeisis.
- Location: epiphyses of long bones, pelvis.
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COMPACT BONE
vascular CT; Haversion system (osteon) visible; Volkmann's cannals present. - Function: support for body.
- Location: long bones.
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