+ Bone Markings and Joints
+ Do Now Quiz Corrections Questions pg. 173
+ Objective Explore the joints of the body Arthro- Of a joint; relating to the joint EXAMPLE: Arthritis? Inflammation of the joint
+ Functions Joints have 2 functions Hold bones together Allow for flexibility Structural classification Fibrous Cartilaginous Synovial
+ Functional Classification Synarthorotic Joints Amphirarthrotic Joints Diarthrotic Joints
+ Synarthrotic Joints Immovable Joints Joints of the skull Sutures of the flat bones that make up the skull
+ Amphirarthrotic Joints Slightly Movable Joints Vertebrae Don’t have full motion but provide enough motion with in the back
+ Diarthrotic Joints Freely moveable Shoulders Hips Knees Elbows Lubricated for joint movement Synovial fluid
+ Diarthrotic Joints Ball and Socket Joints Hip and shoulder Shoulder is relatively unstable Golf ball on a golf tee Hinge Joint What do you think of with a hinge? 1 plane of movement Elbow joint
+ Diarthrotic Joints Pivot What does it mean to pivot? Allows for rotational movement Atlas and axis vertebrae Saddle Concave/convex articulation Cowboy sitting on a saddle Biaxial Movement in 2 planes, no rotation Thumb joint Caropometacarpal joint
+ Fibrous Joints Bones joined by fibrous tissue Some are slightly moveable, most are synarthrotic (no movement) Sutures – bones interlock and are connected by short tissue fibers EX: Skull joints
+ Cartilaginous Joints Articulating ends connected by cartilage For the most part, these joints are slightly moveable EX: Intervertebral joints
+ Synovial Joints Articulating bones are separated by joint cavity containing synovial fluid Movements vary from 1 axis to multiaxial All synovial joints contain: Joint surface enclosed by 2 layer articular capsule Outer part of the capsule is a dense fibrous connective tissue. Lines inside by synovial membrane Articulating surfaces lined with articular cartilage Articular capsule reinforced with ligaments, bursae or tendon sheaths
+ Homework Read pg. 114 from the packet about “Movements Allowed by Synovial Joints” Understand diagrams on pg. 115 Complete pg. 117 from packet