articulations and joints

BIOL 243

synarthroses joints

joints that are immovable

amphiarthroses

joints that are slightly movable

diarthroses

joints that are freely movable

fibrous joints

• bones joined by dense fibrous connective tissue

• no joint cavity

  • no space at all

• most are immovable (synarthrotic)

• 3 types

  • sutures

  • syndesmoses

  • gomphoses

sutures

• one of the types of fibrous joints

• ties in all skull bones

• lines in skull

• infant skull; allow for brain growth

  • skull isn’t fully developed

  • soft spots

syndesmoses

• one of the types of fibrous joint

• connected by ligaments and fibrous tissue

  • webbing

  • holds bones in their position

  • tibia/fibula (feet) and radius (thumb side)/ulna (pinky side) (amphiarthrotic)

    • allows for a little movement

gomphoses

• one of the types of fibrous joints

• teeth and periodontal ligament

  • teeth sewn into tissue by periodontal ligament

  • do not move (in adulthood)

cartilaginous joints

• bones united by cartilage

• no joint cavity

  • similar to fibrous

• not highly movable

• 2 types

  • synchondroses

  • symphyses

synchondroses

• one of the types of cartilaginous joints

• plate of hyaline cartilage connect bones