Joints & types of ossification

synarthroses

immovable joints

Suture, Gomphosis, Synchondrosis, Synostosis

4 types of synarthroses

Suture

Fibrous joint , only in skull, bound by dense fibrous connective tissue

Gomphosis

Fibrouis connection (periodontal ligament), binds teeth to sockets

Synchondrosis

cartlaginous , epiphyseal cartilage of long bones, between vertebrosternal ribs and sternum

Synostosis

fused bones, immovable, metopic suture of skull between two halves of frontal bone, epiphyseal lines of long bones

Amphiarthroses

slightly movable joints

Syndesmosis, symphysis

2 types of amphiarthroses

Syndesmosis

fibrous, bones connected to ligaments, distal end of tibia and fibula

Symphysis

cartlaginous, bones seperated by fibrocartilage, pelvic bones, allows flexibility

Endochondrial Ossification

ossifies bone that originates as hyaline cartilage

Primary ossification center

fibroblasts migrate to bone center and differentiate into osteoblasts to create the...

Secondary ossification center

Center of epiphysis calcify, capillaries and osteoblasts enter area forming the...

Intramembranous ossification

produces dermal bones such as mandible and clavicle, flat bones in the skull, occurs in dermis

Appositional growth

compact bone thickens and strengthens along long bones with layers of circumferential lamellae

appositional growth

bone growth occurs to the outer surface

appositional growth

causes enlargement of medullary cavity as bone gets larger in diameter

epiphyseal lines

when long bones stop growing after puberty