joints articulations where 2 or more bones connect
TRANSCRIPT
Joints
Articulations
Where 2 or more bones
connect
Reason for Joints
Connect bonesoProvide SupportoMake them secure
Allow for movement in most cases
Hyoid only bone that doesn’t connect with another boneoAnchors tongue
3 Types of JointsClassified by how
much movement they allow
SynarthrosesConnective fibers
grow between the bones
Structurally Strong
Suture Line “show” jointo Skullo Pelvis
Fibrous Jointso Tib / Fibo Radius / Ulna
Teeth
No Movement
Skull Suture Joint Development
AmphiarthrosesCartilage Disc
connects the bonesCarry a lot of weightSymphysis pubis
jointVertebral joints
o Allows for varied movement
o Absorb forceo Discs filled with a gel
Ribs to Sternum
Slight Movement
Diarthroses
Capable of many types of MovementsoSome just one movement (two directions)
• Knee - 2oSome joints capable of many directions
• Elbow - 4• Ankle – 6• Wrist – 7
Synovial Joints
Free Movement
Structure of Synovial Joints
Joint Capsuleo Fits over the ends of two
bones like a sleeve
Ligamentso Connect two bones
together
Articular Cartilageo Cushion bone endso reduce friction
Synovial membraneo Lubricating fluid
Types of Diarthroses
Ball and Socketo Shoulder & Hip
Hingeo Elbow & Fingers
Pivoto Atlas/Axis (C1 & C2)o Radius/Ulna
Types of Diarthroses
Saddleo Carpometacarpal
joint of the thumb
Glidingo Superior & inferior
articulating surfaces of vertebrae
Ellipsoid / Condyloido Wrist
Name That Joint