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33 Cards in this Set

  • Front
  • Back
Definition of Cartilage
A type of supporting, connective tissue
The 3 functions of cartilage
Support soft tissue (e.g. tracheal rings)
Gliding surface at joints (e.g. epiplyses, menisci)
Provides model during bone development
Components of Cartilage
Ground Substance
Details of Fibers
Collagen (type II) with some elastic fibers present for flexibility
Details of Ground Substance
Firmness attributed to chondroitin sulfat and hyaluronic acid
Contains up to 80% water
Details of Chondroblasts
Develop from perichondrium
Produce ground substance and fibers of developing cartilage
Produce sufficent matrix to maintain cartilage
Details of Chondrocytes
Develop from chondroblasts
Lie in spaces within matrix called lacunae
How the cartilage matrix is produced
Division of chondrocytes
Details of Hyaline cartilage
Densely packed collagen fibers in water
Always surrounded by perichondrium
Where hyaline cartilage is being used
Forms skeleton and costal, tracheal, laryngeal, nasal, and articular cartilages
Details of elastic cartilage
Less collagen, more elastic fibers
Fibers loosely packed-allows for flexibility
No perichondrium at maturity
Repaired by chondroplasts
Where elastic cartilage is
Auricle, epiglottis
Details of fibrocartilage
Little ground substance, thick bundles of collagen fibers
Allows slight movement, more resistant to tension
Where fibrocartilage is
Intervertebral disks, symphysis joints, menisci
Functions of bone
Support soft tissue structures
Protect organs/ systermis
Storage (chemical homeostasis)
Key difference between bone and Cartilage
Ground Substance
Components of bone
Ground Substance
Details of Bone fibers
Collagen (type I) provides tensile strength and is the organic component of bone
Details of bone Ground substance
Mainly calcium phosphate, calcium hydroxide, and calcium carbonate
Forms hydroxyapetite crystals
Inorganic compoonent of bone
Components of bone matrix
Ground substance and fibers
Details of osteoblasts
Cells that produce the extracellular matrix
Found on the surface of any developing bone area
Details of osteocytes
Develop from osteoblasts that have become surrounded by matrix
Lie in spaces within matrix called lacunae
When mature become inactive
Details of Osteoclasts
Capable of degrading and reabsorbing matrix
Found on the surface of any bone undergoing remodeling
Characteristics of short bone
Geometrically equivalent in all directions
(eg carpals and tarsals)
Characteristics of flat bone
Two parallel layers of compact bone with trabecular
(eg cranium, sternum, ribs, scapula, frontal)
Characteristics of sesmoid bone
Develop in tendons (eg. patella)
Variable and occur due to tensions
Charactereistics of long bone
Have elongated shaft and enlarged end
(eg humerus, femur, tibia)
Characteristics of irregular bone
Complex shape
(eg vertebrae, some skull bones)
Details of nonlamellar tissue
(woven/ immature bone tissue)
Found in developing bone/ bone repair sites
Matrix not organized in layers
"Bone callus", different with two types
Details of Lamellar tissue
Collagen fibers are well organized in bundles with the matrix laid in layers
2 types are present in the body: Compact and trabecular
Nutrients reach cells via diffusion alon canliculi
Details of compact lamellar tissue
Composes the external surface of all bones
Covered by periosteum except where articulate cartilage is found
Details of trabecular lamellar tissue
Lamellae forming branching plates called "trabeculae" rather than "osteons"
Sheets at different angles to one another as opposed to on top of one another
Complex latticework of bone tissue
Details of Canliculi
Found in epiphyses of long bones as well as in short, flat, and irregular bones
Contains red bone marrow in heads of humerus and femur and in vertebrae, sternum, ribs, and pelvis