Lab+3+Bone+Cart+Histo+Arms_withHistoReview

Lab+3+Bone+Cart+Histo+Arms_withHistoReview - Histo Review...

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Histo Review
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Week 3: Cartilage, Bone, Joints, and the Upper Extremity Part 1: Cartilage histology Part 2: Bone histology Part 3: Joints Part 4: Arm MM and bones
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Properties of Cartilage Dominated by extracellular matrix – Mostly ground substance (proteoglycans, H 2 O) – Collagen fibers, sometimes elastin fibers – Cells are called chondrocytes ; these sit in small spaces within the matrix called lacunae Avascular (rare for CT) • Semi-rigid
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Types of Cartilage Hyaline cartilage – has a moderate amount of collagen fibers – joint surfaces, involved in bone formation • Fibrocartilage – contains lots of collagen fibers – intervertebral discs, pubic symphysis Elastic cartilage – collagen and elastin fibers – ear, larynx, Eustachian tubes, epiglottis
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Functions of Cartilage Support of body (intervertebral discs) Support/protection against collapse (trachea) Increase joint mobility by reducing friction Template for bones in embryonic/growing skeleton
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Hyaline Cartilage lacuna chondrocyte
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Fibrocartilage
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Elastic Cartilage
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Development of Cartilage Appositional Interstitial MMW 6.11 Cell division at the perichondrium ECM hypertrophy creates more space (perichondrium and mitosis) (cell and ECM hypertrophy)
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Properties of Bone
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