Anatomy - skeleton system

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Anonymous
ID:
296317
Filename:
Anatomy - skeleton system
Updated:
2015-02-19 12:35:06
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Anatomy
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Anatomy
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  1. Three types of protein fibers in CT matrix
    • Collagen - tough, flexible, "rope"
    • Elastin - stretches and recoils "rubberband"¬†
    • Reticular fibers - net-like
  2. Hyaline cartilage
    • Most common
    • Closely packed collagen, smooth and firm
    • Bone ends (articular), fetal skeleton
  3. Elastic cartilage
    • Collagen + elastic fibers
    • Tough & flexible
    • External ear
  4. Fibrocartilage
    • Networked collagen, durable
    • Intervertebral discs, menisci
  5. General characteristics of cartilage
    • No innervation (nerves)
    • Avascular (no blood vessels)
    • Perichondrium - outer covering, support and nutrition¬†
    • -around most (not articular surfaces)
  6. The most important matrix protein in cartilage?
    The most important matrix protein in bone?
    The key difference between bone and cartilage?
    Ossification is the?
    • Collagen
    • Collagen
    • The salts
    • The complete replacement of a tissue with bone
  7. Compact bone
    • Outer surface, dense & solid
    • Cells and matrix into osteons
    • -pillars of layers
    • -opposite orientation collagen fibers
    • Resist forces parallel to surface and twisting
  8. Spongy bone
    • Trabeculae from network
    • Lightweight, multiple force directions
    • Inside & ends of bones
  9. Marrow
    • Yellow marrow - fat (diaphyses)
    • Red marrow - stem & blood cells (located in epiphyses)¬†
    • Infants - most of bone is marrow
    • Adults - proximal ends of femur and humerus, sternum and pelvis
  10. Periosteum
    • Covering of CT, blasts, clasts
    • N & blood supply
    • Growth and remodeling, fusion w/ CT framework - ligaments, tendons, fascia

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