A&P Lecture Chapter 6.2
describe the structure of hyaline cartilage
contains chondroblasts, which becomes a chondrocyte, which occupies a lacuna within the matrix. the matrix contains collagen and proteoglycans. the perichondrium covers most cartilage
matrix
contains collagen fibers to provide strength and proteoglycans for resiliency
articular cartilage
covers bones at the joins and has no perichondrium
growth of cartilage
cartilage grows in 2 ways. appositional-where chondroblasts in the perichondrium add new cartilage to the outside edge of the existing cartilage. interstitial-chondrocytes within the tissue divide and add more matrix between the cells
cartilage
consists of specialized cells that produce matrix which are chondroblasts and chondrocytes
explain the types of cartilage growth
appositional-chondroclasts in the perichondrium add new cartilage to the outside edge of the existing cartilage. the chondroblasts lay down new matrix and add new chondrocytes to the outside of the tissue. in interstitial growth, chondrocytes within the tissue divide and add more matrix between the existing cells
chondroblasts
form matrix
perichondrium
is a double layered connective tissue sheath that covers cartilage, except at articulations. inner perichondrium is more delicate, has fewer fibers, and contains chondroblasts. outer perichondrium is penetrated by blood vessels and nerves. there is no blood vessels in the cartilage itself
relate the importance of cartilage to the structure of the skeletal system
it provides support and is the precursor for most bones bc it is involved in bone lengthening and repair
chondrocytes
when a matrix surrounds a chondroblast, it becomes a chondrocyte which occupies a space called a lacuna