notes-3-22 - 3/22/10...

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3/22/10 Study session Thursday and Monday after lecture Cartilage -cells (chondrocytes) surrounded by large amt of extracellular matrix which they produce -surrounded by fibrous layer- perichondrium Growth – 2 ways 1) By addition of chondroblasts from the perichondrium (fibroblasts- chondroblasts) 2) By division of chondrocytes within the matrix Chondrocytes- lie in lacunae (lakes) -lacunae- fluid filled spaces within matrix -chondrocytes can divide (within lacunae first) -daughter cells grow further apart as they secrete extra-cellular material Not well supplied with nerves and blood vessels… slow to heal Bone -type of connective tissue -extensive, hard, mineralized Very dense extra cellular component – produced by osteocytes Major mineral – calcium phosphate (crystallized as hydroxapatite) Strong – resists compression, rigid -can be re-shaped even though rigid -highly vascularized Cells (osteocytes) remain in contact w/ each other
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notes-3-22 - 3/22/10...

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