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18 Cards in this Set

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  • Back
Name the four components of the skeletal system
bones
cartilage
tendons
ligaments
Name the five functions of the skeletal system
protection
movement
support
storage- fats & minerals; calcium & phosphorus
Cartilage
FIrm, smooth, resilient, nonvascular tissue
Name the three types of cartilage
hyaline cartilage *most bones develop from this
fibrocartilage
elastic cartilage
hyaline cartilage
consists of specialized cells that produce a matrix surrounding the cells
chondroblasts
cells that produce more cartilage
chondrocyte
a rounded cell that occupies a space called lucuna within the matrix- (when matrix surrounds the chondroblasts they become chondrocytes)
matrix
the matrix contains collagen = strength and proteoglycans = make cartilage resilient by trapping water
proteoglycans
macromolecule consisting of numerous polusaccharides attached to a common protien carrier.
perichondrium
a double layered connective tissue sheath covering most cartilage
Describe the outer layer of the perichondrium
a dense irregular connective tissue containing fibroblasts
fibroblasts
spindle-shaped or stellate cells that form connective tissue
Describe the inner layer of the perichondrium
more delicate layer has fewer fibers & contains chondroblasts
chondroblasts
cells that produce more cartilage
Blood vessels & nerves penetrate the outer layer of the perichondrium but ______ enter the cartilage of the matrix
do not
How do the nutrients get into the cell?
they must difuse thru the cartilage matrix to reach the chondrocytes
Articular Cartilage
cartilage covering the ends of bones where they come together to form joints has no perichondrium, blood vessels, or nerves
Name & describe the two different ways cartilage grows
appositional growth- chondroblasts in the perichondrium lay down new matrix and add new chondrocytes
iterstitial growth - chondrocytes within the tissue divide and add more matrix between the cells