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Exercise 13 Articulations and Body Movements

joints structures
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Fibrous Joints
An articulation in which the bones are joined together by dense fibrous connective tissue, lack a joint cavity, and almost no motion is possible. Types are sutures, syndemoses, and gomphoses. (Most are synarthrotic joints.)
sutures
immovable joints between skull bones. Type of fibrous joint
syndesmoses
Type of fibrous joint. Bones held together by ligaments. EX) Distal tibiofibular (no movement btwn tibia and fibula)
Cartilaginous Joints
Have no joint cavity, Bones held together by cartilage. Examples are growth plates, disks between vertebrae and the pelvic symphysis, slight movement
Symphyses
bones are connected by a broad, flat disc of fibrocartilage
Synchondroses
Structurally cartilagenous joint with hyaline cartilage, found temporarily in epiphyseal plates, permanently in costal cartilage (Functionally synarthroses - immovable)
Synovial Joints
bone ends separated by joint cavity w/synovial fluid; i.e knee, freely moving joints
Plane Joint
articulating surfaces flat, only allow short gliding or transition movements; intercarpal/intertarsal joints and between the vertebrae
Hinge Joint
a freely moving joint in which the bones are so articulated as to allow extensive movement in one plane
Pivot Joint
one bone rotates in a ring of another bone that does not move; head and neck
Condyloid Joint
Egg shaped end of one bone that fits into an oval cavity of another, allowing moving bon to go side to side and back & fourth
Ball and socket Joint
spherical head of one bone fits into a round socket in another; i.e. shoulder
Saddle Joint
type of joint found at the base of each thumb; allows grasping and rotation