L5 - Bone Growth And Tissues Flashcards
(42 cards)
Endochondral ossification
Process of turning cartilage to bone
Step 1 of process
Start of calcification
Step 2
Blood vessels and osteoblasts grow outside cartilage
Step 3
Blood vessels and osteoblasts become internal
Step 4
Primary ossification centre is developed
Primary ossification centre
The first place that ossification occurs,in the diaphysis
Step 5
Secondary centres of ossification form
Secondary ossification centres
Found in the epiphyses, same ossification process, separated from the diaphysis by un-ossified cartilage called the growth plate
Epiphyseal plates purpose
To allow bone growth to occur, adding layers of bone to the growth plate and allows them to increase while the joints stay appropriately proportional
Step 6
Epiphyses start to fuse with diaphyses
Chondrocytes at Epiphyseal side
Continue to divide and enlarge
Chondrocytes at diaphyseal side
Degenerate
Cartilage
Hyaline - default, fibrocartilage - fiborous cartilage
DFCT
Dense fibrous connective tissue
DFCT examples
Ligaments, tendons, and joint capsules
Chondrocytes
Make cartilage and are found in lacuna
Ground substance
Weird shit with collagen fibers
Avascular
No blood vessels, nutrients must diffuse through matrix by joint loading
Joint loading
Pushing the substance through the cartilage with movement
Hyaline cartilage function
Resist compression
Hyaline cartilage form
High water content in matrix and sparse collagen fibers
Subcondal
Under cartilage
Fibrocartilage purpose
Resist compressions and tension
Fibrocartilage form
Many collagen fibres, water in ground substance