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27 Cards in this Set
- Front
- Back
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3 types of cartilage |
hyaline elastic fibro |
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What separates cartilage from other CT's? |
does not contain blood vessels |
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What is condrocytes? |
specialized mature cells in cartilage |
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What is chondrogenic cells? |
Cartilage stem cells that can transform into chondroblasts which can transform into chondrocytes |
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Which cell produce components for the extracellular substance during cartilage formation? |
Chondroblasts |
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What is lacunae? |
Small spaces where chondrocytes are found, either single our in small groups |
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What is a chondral territory |
lacunae surrounded by condensed ground substance (matrix)
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What is hyaline cartilage and where can it be found? |
consist of chondral territories surrounded by meshwork of thin fibers (collagen II) -very resistant to compression found in: articular surfaces, larynx, trachea and bronchi Makes up models of long bones in children |
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What is the proteoglycans task in hyaline cartilage? |
Makes it resistant to compression |
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properties of Elastic cartilage |
chondral territories, meshwork (collagen II), ground substance Found in auricle, auditory tube, epiglottis: ELASTIC |
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Properties of fibrocartilage
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chondral territories (few) Collagen I small amounts of ground substance no perichondrium found in temporomandibular joint, between in vertebral disks and pubic symphysis. |
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What is perichondrium? |
Outer surface of cartilage (dens CT) innervated by blood vessels, contains chondrogenic cells
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What are the cells making up bone? |
osteoprogenitor cells osteoblasts osteocytes osteoclasts
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What is the components of extracellular substance of bone? |
calciumphosphate collagen fibres ground substance (osteoid): proteoglycans, glycoproteins
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What are the different types of lamellae in long bone shaft? |
-systemic (osteons) -intersystemic (between osteons) -circumferential (outer, inner) |
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what is the difference of perichondrium and periosteum? |
Perichondrium protects cartilage, periosteum protects bone. (in fetal development: perichondrium becomes periosteum) |
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What is lining the inner surface of bone? |
Endosteum (inactive osteoblasts) |
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The 6 stages of endochondral ossification |
1. Hypertrophy, formation of bone collar 2. degeneration and mineralization 3. Invasion 4. Destruction of cartilage, formation of new bone 5. formation of 2dary ossification centers 6. Ossification and termination |
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Two types of bone formation |
endochondrial ossification intramembraneous |
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How is spongy bone formed? |
intramembraneous ossification |
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Two types of mature bone |
spongy compact |
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What is the roll of osteoblasts |
fetal bone development mature bone repair, remodeling control differentiation and recruitment of osteoblasts produce components of extracellular substance, control its mineralization |
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What is the roll of osteoclasts? |
Bone formation remodeling repair |
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What happens during bone remodeling? |
destruction of bone tissue (extra and intracellular digestion)
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What is the roll of osteocytes? |
Keepin calcium levels of blood, participate in bone formation; different functional states |
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Where is osteprogenitor cells active? |
fetal bone development mature bone repair, remodeling |
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What is osteonectin and its function? |
Glycoprotein of bone: binds HA to collagen |
