InSight
J o i n t s
Figure 5.13
THE PLANNER
Several types of joints connect bones in the skeleton.
Joints vary in their structure (fibrous, cartilaginous,
synovial), and degree of movement.
Synovialjoints
• Fluid-filled cavity between bones
• Encapsulated
• Bone ends covered with cartilage
• Held together by ligament
• Six types
• Flexible and freely-movable joints
Cartilaginousjoints
• Held together by hyaline
cartilage or fibrocartilage
• Permit little or no movement
• Types include synchondroses
and symphyses
Suture
(thin layer of dense,
irregular connective
tissue between bones)
Synchondroses
(epiphyseal growth plates
connected by cartilage)
4
Epiphysis
Fibrousjoints
• Held together by irregular
connective tissue
• Types include sutures,
syndesmoses, and interosseous
membranes
• Permit little or no movement
— Femur
' ------ Diaphysis
Articulating
bone
Synovial (joint)
cavity (contains
synovial fluid)
Synovialjoint
Articular
cartilage
Articulating
bone
Fibula —
Tibia
Symphysis
(bone ends are covered
by cartilage, but the bones
are connected by broad
discs of fibrocartilage)
Interosseous
membrane
Substantial sheet of
dense connective
tissue binds
neighboring long
bones
Syndesmosis
Greater distance
between bones
connected by denser
connective
tissue (distal
tibiofibular joint
held together by
anterior
tibiofibular ligament)
Articulations Form Where Bones Join Together 137
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